[外语类试卷]专业英语八级(阅读)模拟试卷112及答案与解析.doc
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1、专业英语八级(阅读)模拟试卷 112及答案与解析 SECTION A MULTIPLE-CHOICE QUESTIONS In this section there are several passages followed by fourteen multiple-choice questions. For each multiple-choice question, there are four suggested answers marked A , B, C and D. Choose the one that you think is the best answer. 0 (1)Im
2、agine yourself lying in bed, your mind in turmoil. You toss and turn, but sleep wont come. Maybe a bedtime snack would help. What should you choose? If you think first of toaster waffles or popcorn, some experts would say youre on the right track. Foods high in complex carbohydratessuch as cereals,
3、potatoes, pasta, crackers, or rice cakesmake many people relaxed and drowsy. (2)Missed that one? Try again. Suppose the weathers rotten, you forgot your homework, and your best friends mad at you. Whats good medicine when youre feeling low? A sugary cola or candy may give you a quick lift, but youll
4、 crash just as quickly. Better choices may be Brazil nuts(for selenium), skim milk(for calcium), or a spinach salad(for folic acid). In research studies, all three of those nutrients have been shown to lift spirits and battle the blues. (3)Try one more. You have a math test coming up in the afternoo
5、n. You want to be sharp, but you usually feel sleepy after lunch. Is your best choice an energy fix of fries and a shake or a broiled chicken breast and low-fat yogurt? If you pick the high-fat fries and shake, you may feel sluggish and blow that test. The protein-rich chicken and yogurt are better
6、choices. Protein foods energize, some experts say. (4)How does food affect mood and mind? The answer may lie in the chemistry of the brain and nervous system. Molecules called neurotransmitters are chemical messengers. They carry a nerve impulse across the gap between nerve cells. The release of neu
7、rotransmitter molecules from one neuron and their attachment to receptor sites on another keep a nerve impulse moving. (5)Nerve impulses carry messages from the environment to the brain, for example, the pain you feel when you stub your toe. They also carry messages in the other direction, from the
8、brain to the muscles. Thats why you back away from the obstacle that initiated the pain signal and exclaim, “Ouch! “ (6)“Many neurotransmitters are built from the foods we eat,“ says neuroscientist Eric Chudler of the University of Washington. Too little or too much of a particular nutrient in the d
9、iet can affect their production, Chudler says. For example, tryptophan from foods such as yogurt, milk, bananas, and eggs is required for the production of the neurotransmitter serotonin. Phenylalanine from beets, almonds, eggs, meat, and grains goes into making the neurotransmitter dopamine. (7)Doz
10、ens of neurotransmitters are known; hundreds may exist. Their effects depend on their amounts and where they work in the brain. The neurotransmitter serotonin, for example, is thought to produce feelings of calmness, relaxation, and contentment. Drugs that prevent its reuptake(into the neuron that r
11、eleased it)are prescribed to treat depression. In at least some healthy, non-depressed people, carbohydrate foods seem to enhance serotonin production and produce similar effects. “It is the balance between different neurotransmitters that helps regulate mood,“ Chudler says. (8)Proper nutrition may
12、also enhance brainpower. Choline is a substance similar to the B vitamins. Its found in egg yolks, whole wheat, peanuts, milk, green peas, liver, beans, seafood, and soybeans. The brain uses it to make the neurotransmitter acetylcholine. To test the effects of choline on memory and learning, researc
13、hers at the Massachusetts Institute of Technology gave memory tests to college students before increasing the amount of choline in their subjects diets. Later, they retested. On the average, memories were better, and the students learned a list of unrelated words more easily. (9)“Were just scratchin
14、g the surface in this field,“ says Larry Christensen, a psychologist at the University of South Alabama, “but we know that there are definite behavioral effects of diet.“ Theres a lot to learn, and future research may reveal more about the chemistry of mood, brain, and nutrition. Until then, it make
15、s sense to choose healthy foods that nourish both body and mind. 1 According to the passage, _ might be the best food choice when one feels nervous and wants to fall asleep. ( A) candy ( B) spaghetti ( C) Brazil nuts ( D) yogurt 2 Which of the following is NOT true about neurotransmitters, according
16、 to the passage? ( A) Many of them are built from what we eat. ( B) The amount of particular nutrients affects their production. ( C) Hundreds of them are already known. ( D) Their effects depend on their amount others count security as an ordinary business expense. The Securities and Exchange Commi
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