A) Caffeine blocks production of the enzyme that stops melatonin production.
B) Caffeine interrupts the flow of sleep hormone.
C) Caffeine halves the body's levels of sleep hormone.
D) Caffeine stays in the body for many hours.
3. What does paragraph 3 mainly discuss?
A) Different effects of caffeinated coffee and decaf on sleep.
B) Different findings of Lotan Shilo and a team about caffeine.
C) The fact that the subjects slept 415 minutes per night after drinking decaf.
D) The evidence that the subjects took half an hour to fall asleep.
4. What does the experiment mentioned in paragraph in paragraph 4 prove?
A) There are more enzymes in decaf drinkers' urine sample.
B) There are more melatonin concenrrations in caffeine drinkers' urine sample.
C) Decaf drinkers produce less melatonin.
D) Caffeine drinkers produce less sleep hormone.
5. The author of this passage probably agrees that
A) coffee lovers sleep less than those who do not drink coffee.
B) We should not drink coffee after supper.
C) People sleep more soundly at midnight than at 3 a.m.
D) If we feel sleepy at night, we should go to bed immediately.
第五部分：补全短文（每题2分, 共10分）
阅读下面的短文，文章中有5处空白，文章后有6组文字，请根据文章的内容选择5组文字，将其分别放在文章原有位置，以恢复文章原貌。请将答案涂在答题卡相应的位置。
How one simple movement can let slip the secrets of the mind
Body language is the quiet, secret and most powerful language of all! It is said that our body movements communicate about 50 per cent of what we really mean while words themselves only express 7 per cent. So, while your mouth is closed, just what is your body saying…
Arms. ——(1)——If you keep your a／ins to the sides of your body or behind your back。this suggests you are not afraid of taking on。whatever comes your way。——(2)——If someone upsets you, just cross your arms to show you're unhappy!
Head. When you want to appear confident, keep your head level. If you are monitor in class, you can also take on this position when you want your words to be taken seriously.——(3)——
Legs. Your legs tend to move around a lot more than normal when you are nervous or telling lies. If you are at interviews, try to keep them still!
Posture. A good posture makes you feel better about yourself. ——(4)——This makes breathing more difficult, which in turn Can make you feel nervous or uncomfortable.
Mouth. When you are thinking, you often purse your lips. You might4 also use this position to hold back an angry comment you don't wish to show. ——(5)——
词汇：
confident／adj. 自信的
purse／vt. 皱缩；皱拢
outgoing／adj. 开朗的
posture／n. 姿势
inwards／adv. 向内
receptive／adj. 善于接受的, 能接纳的
练习：
A If you ale feeling down (5),you normally don't sit straight, with your shoulders inwards.
B If you are pleased, you usually open your eyes wide and people Can notice this.
C Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies.
D How you hold your arms shows how open and receptive you ale to people you meet.
E However, it will probably still be noticed, and people will know you're not pleased.
F However, to be friendly in listening or speaking, you must move your head a little to one side.
第六部分：完型填空 （每题1分, 共15分）
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上。
Eat for a Good and Healthful Life
Food __1__ us alive. It is our sustenance and our pleasure. But recently, research has shown that the eating habits of the average Americans may be dangerous to future health.
The foods Americans now choose are oftentimes too __2__ in calories and fats, so this article reports a new study: Diet and Health, Implications for Reducing Chronic Disease Risk.
The study, conducted __3__ the National Research Council's committee on Diet and Health, __4__ that balancing nutrition, calories and activity is key __5__ enjoying a long and healthful life.
The report recommends that most Americans increase __6__ activity to a moderate level and make changes in food __7__ and calories intake to maintain ideal weight. Most of us --- even those of us at ideal weight --- need to eat __8__ fat so that no more than 30% of our daily calories will come from fat.
That means cutting __9__ on red meat and whole milk dairy products. __10__, eat fish, chicken without skin, lean meats, and low-fat and no-fat dairy products.
The report of the Committee on Diet and Health recommends we eat five or more 1/2-cup servings of vegetables and fruits __11__ --- especially green and yellow vegetables and citrus fruits.
Eating more fruits and vegetables doesn't have to mean increased calories intake. Many plant foods are nutrient-rich: they provide many vitamins and minerals for very few __12__.
Nutrient-rich foods are particularly important for Americans __13__ age 50. As we __14__, we need to eat less because our bodies need __15__ calories to function properly. But we still need full measures of vitamins and minerals to release the energy in our foods and make us feel strong and healthy.
1. A remain B remains C keep D keeps
2. A full B rich C little D special
3. A by B at C with D for
，2017职称英语模拟题卫生C 第二套