健康

a period of debility  n. 体能低落、衰弱期
acne  n. 痤疮,粉剌
active sleep   n. 积极睡眠
adrenalin    n. 肾上腺素
adverse effect   n. 反作用
aerobics    n. 有氧运动
AIDS (Acquired Immune Deficiency Syndrome) 艾滋病 (获得性免疫缺陷综合)
allergy   n. 过敏
Alzheimer’s disease   n. 老年痴呆症
anthrax   n. 炭疽
anti-aging   adj. 抗衰老
antibiotics    n. 抗生素
antibody   n. 抗体
anti-SARS campaign  n. 抗非典斗争
arthritis  n. 关节炎
artificial heart   n. 人造心脏
artificial hormones   n. 人造激素
asthma   n. 哮喘
avian influenza (bird flu)   n. 禽流感
B.O. (Body Odor)   n. 体臭
backache  n.背痛
bioengineering   n. 生物工程
biologist   n. 生物学家
bird flu   n. 禽流感
bleeding    n. 出血
blemish     n. 瑕疵,疤痕
blister     n. 水泡
blood circulation    n. 血液循环
bruise      n. / v. 瘀伤, 擦伤, 青紫
BSE (bovino spongiform encephalopathy)   n. 疯牛病
burp  n. 饱嗝儿, 打嗝 v.打饱嗝
carbohydrate   n. 碳水化合物
cardiac     adj./n.心脏(病)的
cardiologist    n. 心脏病专家
cholesterol   n. 胆固醇
chronic       adj. 慢性的
HBV carriers  乙型肝炎病毒携带者
cirrhosis of liver    n. 肝硬化
(masked palm) civet     n. 果子狸
cleanse     v. 清洗, 净化
coma    n.昏迷
comatose   adj. 昏睡的,昏迷不醒的
coronary disease    n. 冠心病
cough   v./n. 咳嗽
coughing fit   n. 咳嗽发作
craving    n. 强烈的愿望
dandruff   n. 头皮屑
deadly    adj. 致命的
debilitate   vt. 使衰弱, 使虚弱
dehydration    n. 脱水
dementia    n. 痴呆
deodorize    vt. 除臭
dermatologist   n. 皮肤科医生
dermatology    n. 皮肤病学
eating disorder   n. 食欲紊乱
elasticity    n. 弹力,弹性
embryo  n. 胚胎
epidemic   adj.流行的, 传染的 n.时疫, 流行病
epidemic encephalitis B   n. 流行性乙型脑炎
euthanasia / mercy killing  n. 安乐死
extrovert  n. /adj. 性格外向的(人)
fatal   n. 致命的
fertilization   n. 授精
fetus   n. 胎儿
fever   n.发烧
fitness center   n. 健康中心
fitness    n. 健康
foot -and- mouth disease  n. 口蹄疫
genes   n. 基因
genetic information   n. 遗传信息
genome   n. 基因组
gestation  n. 怀孕
GM food (genetically modified food)     转基因食品
GMOs (Genetically Modified Organisms)  转基因生物    
hatch   v. / n. 孵化
health care products  n. 保健品    
herbal medicine    草药
heart attack   n. 心脏病发作
heart failure   n.心力衰竭
hepatitis        n. 肝炎
herbal essence    n. 草药精,草本精华
high blood pressure   n. 高血压
high cholesterol   n. 胆固醇过高
HIV (human immunodeficiency virus)   人体免疫缺损病毒,艾滋病病毒
HIV-positive   adj. 艾滋病病毒测试呈阳性
hoarseness   n.嘶哑, 刺耳
hormone    n. 荷尔蒙,激素
immunity      n. 免疫性
implant   v. /n. 植入
in a vegetative state  处于植物人状态
infertility   n. 不孕, 不育
insomnia      n.失眠, 失眠症
introspective    adj. 内省,内向的,
introvert   n. / adj.性格内向的(人)
irritable   adj. 急躁的
isolation   n. 隔离
itching    adj. 发痒的、渴望的
itchy    adj. 使人发痒的,不安静的,神经质的
IVF (in-vitro fertilization)    n. 试管受精
laser treatment    n. 激光疗法
lesion     n. 感染的皮肤, 损伤
living donor     n. (活体)器官捐献者
maternity leave   产假
matrix   n.子宫
menopause  n. 更年期
mental deterioration   n. 神经退化、衰弱
mental disorder   n. 精神紊乱
metabolism   n. 新陈代谢
migraine   n. 偏头痛
mortality rate   n. 死亡率
nutrient     adj. 有营养的,养分
nutrition    n. 营养,营养学
obesity   n. 肥胖症
odds   n. 可能的机会;几率
odor     n. 气味
offspring    n. 后代
OTC drugs   n. 非处方药
outbreak  n. (疫情等)暴发
paralysis    n. 瘫痪
Parkinson’s disease   n.  帕金森综合症
passive smoking / second- hand smoking  n. 被动吸烟
personal hygiene   n. 个人卫生
pimple     n. 丘疹,面泡,青春豆
plague     n.  瘟疫
pulse       n. 脉搏
quarantine    n. /v. 隔离
rabies  n. 狂犬病
regenerate     v. 再生
remedy       n. 药物,治疗,矫正
renal         adj. 肾脏
respirator       n. 口罩;人工呼吸器
a canister respirator   n. 防毒面具
SARS-affected area   n. 非典疫区
SARS epidemic   n. 非典型性肺炎
slow-wave sleep     n. 慢波睡眠
smallpox  n. 天花
sneeze       v. / n.打喷嚏
snore        n./ v. 打鼾, 鼾声
sore throat  n. 喉咙痛
soreness     n. 痛,痛楚
spasm        n. 痉挛
sperm bank    n. (为人工授精提供精子的)精子库
sperm donor    n. 捐献精子的人
STD (Sexually Transmitted Disease)   n. 性传染病
stem cell     n. 干细胞
sterile    adj. 不育的,无结果的,消毒过的,无菌的
stiff neck  n. 落枕
stolid       adj. 神经麻木的, 感觉迟钝的
stress      n. 压力,焦虑
transplant   n./ v. 移植
trauma   n. 外伤,(心理)创伤
vaccine    n. 疫苗
vivacious  adj. 性格活泼的,快活的
voluntary and confidential testing 自愿的,保密的测试
womb   n. 子宫
wrinkle   n. 皱纹
6) TCM 中医
中医名著 famous TCM work
《黄帝内经》 Huang Di’s Classic of Internal Medicine / Yellow Emperor's   Canon of Traditional Chinese Medicine
《神农本草经》 Shennong’s Herbal Classic
《本草纲目》 Compendium of Materia Medica
《易经》 I Ching; Book of Change
万物人为贵 nothing compares to a human life
救死扶伤 healing the sick and saving the dying
阴阳  yin-yang, the two opposing and complementary principles in nature
相生相克 mutual generation and restriction
对立制约 mutually opposing and constraining
互根互用interdependent and mutually promoting
相互转化mutually transformational
新陈代谢 metabolism
针灸 acupuncture
针刺疗法acupuncture
艾炙疗法 moxibustion
推拿 medical massage
穴位acupuncture point
针刺麻醉 acupuncture anesthesia
综合医院 general hospital
中医部 TCM section/ department
拔火罐疗法 (Chinese) cupping therapy
刮痧疗法skin scraping therapy with water, liquor or vegetable oil
理疗 physical therapy
切脉 feeling the pulse
偏方folk prescription
秘方 secret prescription (normally of excellent curative effect)
祖传秘方   secret prescription handed down from one's ancestors
阴阳五行学说 the theory of yin-yang and five elements (metal, wood, water, fire and earth)

心 heart
肝 liver
脾spleen
胃stomach
肺 lung
肾 kidney


内伤七情 (喜、怒、忧、思、悲、恐、惊) internal causes (joy, anger, worry, thought, grief, fear and surprise)
外感六淫 (风、寒、暑、湿、燥、火) external causes (wind, cold, heat, wetness, dryness and fire)
中药四性 four properties of medicinal herb
寒cold
热hot
温warm
凉cool    
中药五味five tastes of medicinal herb
酸sour
苦bitter
甜sweet
辣spicy
咸salty
按摩message therapy
减肥 lose weight
经络 main and collateral channels inside human body; meridian
食补保健maintain good health through the intake of nourishing food
太极拳 Tai chi quan; Tai chi Chuan; Taijiquan boxing
延缓衰老 to defer senility
药典pharmacopoeia
有机整体 an organic whole
瑜珈 yoga
中国古代药王神农氏 Shennong, herbal medicine master of ancient China
中华医学会  Chinese Medical Association
安全第一,预防为主  safety first, precaution crucial
  在大学英语六级考试中听力占到35%的分数,跟阅读理解的分值一样, 所以无论对于只求及格还是想勇夺高分的考生来说,有着决定性的意义。但文都徐可风却发现考生对听力是无可奈何,无计可施。明知很重要,却没有掌握听力学习得真谛。那么在冲刺阶段,英语六级听力应如何准备呢?文都徐可风给出两点建议。

  一、误入误区

  1、 必需每个单词都听懂才能解题。

  文都徐可风发现很多考生在解听力题的过程中,有一种“完美主义”倾向。非得把听力中每个单词都听出来。结果却是,一旦某个单词卡壳,就不断得纠缠在这个单词身上,而录音却无情地继续进行,到最后,结果可想而知。文都徐可风建议,做听力题毕竟不是谈恋爱,谈恋爱要专一,而听力题中,某个单词或某几个单词听不懂听不清楚,就让它过去吧,毕竟不要为了一棵树而放弃了整片森林。

  2、在长对话和短文题中“走神”

  文都徐可风发现很多考生在做短对话时注意力还是颇为集中的,但一到长对话和短文题就出现“走神”现象。这属于注意力不集中,文都徐可风通过观察,结论是,这种情况一般是因为前面有听不懂的部分,导致后面意思衔接不上,就陷入“走神”。当然,文都徐可风也发现,有一部分考生有时也会莫名其妙的转移注意力。那么解决“走神”的方法是什么呢?文都徐可风的建议是“蜘蛛网原则”。蜘蛛在织网时,头是不会抬起来的,因为一旦抬起头,网可能就会断。所以文都徐可风建议大家养成一个习惯,在平时学习或做题时,强迫自己在30分钟内不能抬头,一旦抬头,从头开始计时。养成习惯后,再逐步增加不抬头的时间,从 30分到40分……只要广大考生按照文都徐可风这个建议去训练,你一定能克服“走神”这个坏习惯。

  二、掌握技巧

  文都徐可风认为,英语六级的听力想在短期内提高成绩,只能借助一些技巧。对于听力解题技巧的详细介绍,请大家参考文都教育集团关于英语六级听力的相关课程及图书。在此,文都徐可风只和大家分享一个现学现用的技巧。这个技巧是“重读即答案”。考生在考场上如果真的听不懂录音,就人马合一,凝神养性,不再追求听懂单词和句型,而是用心去感受,朗读者的语音和语气,如果感觉到语气突然变重的地方,就对后面的三四个单词,留下“音的概念”,(反正也听不懂具体是那个单词),然后看选择项,那个选择项里出现了发音类似的单词,往往就是答案。“重读即答案”也许没办法做到解决一切英语六级听力的题目,但总比乱蒙的正确率高很多。

  但文都徐可风提醒大家,这些技巧永远只是技巧,不能提高大家真正的听力能力,而日后无论想出国还是考研,需要的还是真正的听力能力。所以考完这次英语六级后大家要好好想想和准备如何提高真正的听力能力,这才是阳光大道。
Windows Media Player文件


  Section A
  Directions:In this section,you will hear 8 short conversations and 2 long conversations.At the end of each conversation,one or more questions will be asked about what was said.Both the conversation and the questions will be spoken only once.after each question there will be a pause.During the pause,you must read the four choices marked A), B), C) and D),and decide which is the best answer.Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
  11.A.The woman invites the man to have dinner.
  B.The man won't visit the woman.
  C.The man is very busy these days.
  D.The man's wife is relatively free.
  12.A.He often cuts classes to play basketball.
  B.He has no chance to play basketball.
  C.He's looking for somebody to play the game with.
  D.He loves playing basketball very much.
  13.A.He's surprised she chose that agency.
  B.He wonders why she's kept her job.
  C.He doesn't konw when her classes started.
  D.He doubts she makes much money now.
  14.A.He should try a better and convenient way.
  B.He should give up looking for the book.
  C.He should ask the librarian for help.
  D.He should try the shelves downstairs.
  15.A.Asking someone else to help the woman.
  B.Asking the woman for directions.
  C.Show the woman the map.
  D.Show the woman where the dormitory is.
  16.A.She is going to have some visitors tonight.
  B.She does not like their former foreign teachers.
  C.She is going to see her foreign teachers tonight.
  D.She has already been invited to the man's house.
  17.A.She's never been treated by Dr.Joanna.
  B.She's been sitting in the waiting room too long.
  C.Dr.Joanna isn't the very good choice.
  D.She'd like to recommend a magazine to the man.
  18.A.Spending too much money on the custertoms.
  B.Finding no available conference room in Shangri-la.
  C.Too many customers coming to attend the meeting.
  D.Few customers going to see ice sculptures and buildings.
  Questions 19 to 21 are based on the conversation you have just heard.
  19.A.He usually doesn't return home.
  B.He is short of money.
  C.The house he rents is too large.
  D.He is very lonely.
  20.A.It is dirty in several places,.
  B.It has a few tears here and there.
  C.It is really worn out.
  D.It is out of date.
  21.A.She helps the man fix up the house.
  B.She agrees to share the cost of rent.
  C.She decides to look for another place.
  D.She persuades the man to change a house.
  Questions 22 to 25 are based on the conversation you have just heard.
  22.A.Keys to paper recycling.
  B. Importance of recycling.
  C.Keys to recycling improvement.
  D.Techonological progress in recycling.
  23.A.Newspaper.
  B.Carbon paper.
  C.Food wrapper.
  D.Waxed paper.
  24.A.Sell advanced technology and send more experts to help the companies.
  B.Provide the companies with advanced technologyand equipments.
  C.Lend more money to the companies with high interests.
  D.Give money to the companies to improve their equipments and promote their research.
  25.A.The demand for recycled materials should be increased.
  B.New technology is needed.
  C.The public should know more about recycling.
  D.More trees should be saved.
  Section B
  Directions: In this section,you will hear 3 short passages.At the end of each passage,you will hear some questions.Both the passage and the questions will be spoken only once.After you hear a question,you must choose the best answer from the four choices marked A), B), C) and D).Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
  Passage One
  Questions 26 to 28 are based on the passage you have just heard.
  26.A.They were evident in the decreased world temperature.
  B.They were of several days' duration worldwide.
  C.They were felt mainly in the Dutch East Indies.
  D.They were immediately evident to the world's scientists.
  27.A.England's proximity to the sea.
  B.Volcanic ash in the atmosphere.
  C.Flooding in the area.
  D.Pollution caused by the International Revolution.
  28.A.There was a long interval between cause and effect.
  B.The weather was difficult foe us to forecast.
  C.weather forecast was inaccurate.
  D.Ecologists didn't appear until modern times.

  Passage Two
  Questions 29 to 31 are based on the passage you have just heard.
  29.A.A government document.
  B.A literary work.
  C.A social art.
  D.An individual's creation.
  30.A.Because they were not easily burned and can last long.
  B.Because they were very cheap materials.
  C.Because they could be found here and there.
  D.Because they could add artistic value nto buildings.
  31.A.Architecture and Literature.
  B.Development of Architecture.
  C..Classification of Architecture.
  D..Materials of Architecture.
  Passage Three
  Questions 32 to 35 are based on the passage you have just heard.
  32.A.What they have regretted for a long time.
  B.Their relationships with families and friends.
  C.What they have experienced too much.
  D.The things they have experienced during their childhood.
  33.A.Those dream interpretations are based on psychological thesis.
  B.We can find nothing reliable in those interpretations.
  C.Some dream interpretation of dreams are not very believable.
  D.Most of the interpretations of during their childhood.
  34.A.Reading difficult books.
  B.Competing in athletic competitions.
  C.Talking with some friends.
  D.Encountering an unresolved issue.
  35.A.In dreams we solve those problems.
  B.After dreaming we forget our problems.
  C.After dreaming we have a clear mind.
  D.It gives us ways to deal with the problems.
  Section C
  Directions:In this section,you will hear a passage three times.When the passage is read for the first time,you should listen carefully for its general idea.When the passage is read for the second time,you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard.For blanks numbered from 44 to 46 you are required to fill in the missing information.For these blanks, you can either use the exact words you have just heard or write down the main points in your own words.Finally, when the passage is read for the third time,you should check what you have written.
  Water projects in the United States gained a new principle in the 1930’s.And during this time the nation sufferedits worst economic (36) ______and the Great Plains region suffered its worst (37)______ in recorded history.As the economy sank into a deep depression and (38)______rates increased,the political climate for direct federal government(39)______ in water projects improved.President Franklin Rooseveh’s first 100 days in office brought a (40)______ of new laws to deal with the (41)______economic depression.
  The natural pattern of the Tennessee River was (42)______ by large spring flows that produced (43)______floods and low summer flows that inhibited navigation.(44)______________________________.To counter these natural obstacles,the Tennessee Valley Authority Act of 1933 created the Tennessee Valley Authority (TVA),a public agency with broad powers to promote development in the region,including the authority to build dams and reservoirs and to generate and sell hydroelectric power.(45)___________________________.The TVA inherited the Wilson Dam,
  and by the beginning of the Second World War it had completed six additional multipurpose dams with power plants and locks for navigation.Investments in dams and hydropower facilities within the Tennessee Valley also received high priority during the war.
  (46)_____________________________.The NIRA also gave the United States President unprecedented powers to initiate public works,including water projects.
  【答案见下页】
Windows Media Player文件


  Section A
  Directions:In this section,you will hear 10 short conversations.At the end of each conversation,a question will be asked about what was said.Both the conversation and the question will be spoken only once.After each question there will be a pause.During the pause,you must read the four choices marked [A],[B],[C] and [D],and decide which is the best answer.Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
  1.Q:How much is the normal price for one hamburger?
  A.40 cents.
  B.30 cents.
  C.20 cents.
  D.10 cents.
  2.Q:What conclusion can be drawn from the conversation?
  A.The train is crowded.
  B.The train is late.
  C.The train is empty.
  D.The train is on time.
  3.Q:Where did this conversation most likely take place?
  A.In a store.
  B.In an airport.
  C.In a police station.
  D.On a subway.
  4.Q:Did the man watch the game last night?
  A.No,he missed it.
  B.Yes,he did.
  C.No,he didn't.
  D.Yes,he probably did.
  5.Q:Why does the woman's fiance want to live in the suburbs?
  A.Because life is less expensive in the suburbs.
  B.Because jobs are easier to find.
  C.Because he works in the suburbs.
  D.Because the woman works in the suburbs.
  6.Q:What does the man dislike about the camera?
  A.The model.
  B.The lens.
  C.The price.
  D.The flash attachment.
  7.Q:Why did the woman miss the documentary?
  A.Because she was at the movies.
  B.Because she was in bed.
  C.Because she was in the hospital.
  D.Because she was watching another channel.
  8.Q:What is the woman going to buy downtown?
  A.Some pants.
  B.A suit.
  C.A blouse.
  D.A dress.
  9.Q:What probably happened to Paula?
  A.She lost a finger.
  B.She became a surgical nurse.
  C.Someone hit her in the nose.
  D.She had an operation on her nose.
  10.Q:What does the woman imply?
  A.She has finished only one step.
  B.She doesn't have any more time for redecorating.
  C.It's time for the work to be finished.
  D.The redecorating is being done gradually.
  Section B
  Compound Dictation
  Directions:In this section you will hear a passage three times.When the passage is read for the first time,you should listen carefully for its general idea.Then listen to the passage again.When the passage is read for the second time,you are required to fill in the blanks numbered from S1 to S7 with the exact words you have just heard.For blanks numbered from S8 to S10 you are required to fill in the missing information.You can either use the exact words you have just heard or write down the main points in your own words.Finally,when the passage is read for the third time,you should check what you have written.
  The Effects of Colour
  Researchers have found that"cool"colours,such as blues and greens,can make us feel calm and(S1)_.Blue and green(S2)_can also(S3)_blood pressure,pulse rate,and breathing rate."Warm"colours,such as reds,yellow,and oranges.(S4)_us differently than"cool"colours do."Warm"colours can(S5)_make us feel warmer and(S6)_.They stimulate(S7)_,raise blood pressure,and quicken breathing.Colour can affect our moods.Yellow,a bright,sunny colour,often makes people feel happy and more active.Yet it makes some people feel hot and restless.(S8)_.According to a three-year study in Germany,the answer seems to be yes.Scientists studied how various colours affect school children.(S9)_.Scientists also think that colours can tell us something about people's personalities.(S10)_.
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  Section A
  Directions:In this section,you will hear 10 short conversations.At the end of each conversation,there will be a question.Both the conversation and the question will be spoken only once.After each question there will be a pause.During the pause,you must read the four choices marked [A],[B],[C] and [D],and decide which is the best answer.Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
  1.Q:Who is coming for a visit?
  A.Nancy.
  B.George.
  C.John.
  D.Joe
  2.Q:Where are the two people?
  A.At a hospital.采集者退散
  B.At the airport.
  C.In Mrs.Smith's home
  D.At Mrs.Saxon's house.
  3.Q:Why does the man's suit seem unusual?
  A.The jacket and pants don't match.
  B.It is the wrong color for the season.
  C.It is too light for cold weather.
  D.It does not match his shirt.
  4.Q:What does the man mean?
  A.That he sees a nice motorcycle.
  B.That motorcycles look nicer than cars.
  C.That motorcycles can be dangerous.
  D.That the woman should be interested in motorcycles.
  5.Q:How much change will the woman get?
  A.$20.00.
  B.$6.00.
  C.$10.00.
  D.$4.00.
  6.Q:Where are they going?
  A.To a cafeteria.
  B.To a health centre.
  C.To the beach.
  D.To a drugstore.
  7.Q:What does the woman wish the man to do?
  A.Leave immediately.
  B.Stay longer.
  C.Dine with her.
  D.Prepare the dinner.
  8.Q:How is the hotel now?
  A.The rooms are better but not the meals.
  B.The meals are better but not the rooms.
  C.They are even worse.
  D.Both rooms and meals are better.
  9.Q:Why did the man get fined?
  A.He ran a red light.
  B.he was speeding.
  C.He went through a stop sign.
  D.he turned a corner too fast.
  10.Q:According to the man,which statement best descibes the woman?
  A.She spends too much money.
  B.She works in factory.
  C.She should get a job.
  D.She likes to argue.
  Section B
  Directions:In this section,you will hear 3 short passages.At the end of each passage,you will hear some questions.Both the passage and the questions will be spoken only once.After you hear a question,you must choose the best answer from the four choices marked [A],[B],[C] and [D].Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
  Passage One
  Questions 11 to 13 are based on the passage you have just heard.
  11.How often are most rubber trees tapped for the latex?
  A.Every day.
  B.Every other day.
  C.Twice a month.
  D.Twice a year.
  12.When is the rubber tree not tapped?
  A.When it is between five and six years old.
  B.When it is a few inches tall.
  C.When it has some disease.
  D.When it changes its leaves.
  13.How many pounds of rubber does a young tree usually produce in a year?
  A.Three pounds.
  B.Ten pounds.
  C.Twenty pounds.
  D.Twenty-five pounds.
  Passage Two
  Questions 14 to 16 are based on the passage you have just heard.
  14.What is the first American college degree?
  A.The bachelor's degree.
  B.The associate degree.
  C.The master's degree.
  D.The doctor's degree.
  15.What is a terminal degree?
  A.technical associate degree.
  B.A degree which is designed for transfer.
  C.A bachelor's degree.
  D.One which ends;that is,the last degree one can ever hope to attain.
  16.What is the number of credit hours for a B.A.in literature?
  A.120 quarter hours.
  B.95 quarter hours.
  C.120 semester hours.
  D.72 semester hours.
  Passage Three
  Questions 17 to 20 are based on the passage you have just heard.
  17.What is the purpose of the talk?
  A.To make recommendations on sensible dieting.
  B.To report the latest advances in brain surgery.
  C.To relate an experiment combining sleep and exercise.
  D.To advise on ways of dealing with sleep difficulties.
  18.According to the speaker what happens when you turn and twist to get comfortable position?
  A.Your heart rate is lowered.
  B.It becomes harder to relax.
  C.You become too tired to sleep.
  D.Sleep rhythms are disruped.
  19.According to the speaker what sometimes causes people to have trouble sleeping?
  A.Failure to rest during the day.
  B.Lack of sleep on weekends.
  C.Vigorous exercise in the evening.
  D.Eating cheese before going to bed.
  20.Where is the talk most probably being given?
  A.At a radio station.
  B.In a lecture hall.
  C.In a biology lab.
  D.At the doctor's office.
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