Question

       阅读下面的短文，请根据短文后的要求答题（请注意问题后的字数要求）。

       Scientists guess that 80% of a person’s weight gain comes from genetics and 20% comes from the person’s environment. By 1998, more than 130 genes（基因）and gene neighbors were found to have some link to weight gain or weight loss in people. These different genes can either work all together or work in groups. This means that different people may        or lose weight with difficulty for different reasons.

       One example of these different kinds of combinations（组合）is a family of genes that allows people to change extra fat into heat instead of storing the fat in the body. Animals which have this same family of genes do not gain weight easily as other animals. Other genes may affect how quickly the stomach lets the brain know that it is full. If these genes slow down the passage of this information, people may eat more than they really need. Genes are also thought to be linked with how much a person fidgets（烦躁不安小动作）in a day. Fidgeting is small movements of a person’s hands, feet, arms, or legs usually when the person is nervous or excited. Fidgeting actually uses a lot of energy over a day and his energy usually comes from burning fat.

       In one experiment about weight gain, researchers wanted to see how much energy different people used when they were resting. People in the experiment were asked to lie on a bed and not move for 40 minutes. Researchers then measured the energy the person used for breathing. They found that different people in the study used very different amounts of energy for this one job, breathing. Researchers calculated that some people in the study burned 1,067 calories per day while others burned up to 3,015 calories. Those people who burn fewer calories doing normal work or exercise have a slow metabolism（新陈代谢）.

76．What is the best title of this passage?（Please answer within 10 words.）

77．Which sentence in the passage can be replaced by the following one?

       If these genes don’t pass the information that the stomach is full to the brain on time, people may eat much more.

78．Please fill in the blank in the first paragraph with proper words or phrase to complete the sentence.（please answer within 10 words.）

79．What can we learn from the experiment？（Please answer within 30 words.）

80．Translate the underlined sentence in the second paragraph into Chinese.

Answer 1

1．Genes Affect Weight Gain or Loss/ Genes Are Linked With Weight Gain or Loss/ Genes And Weight Gain or Loss.

2．If these genes slow down the passage of this information, people may eat more than they really need.

3．gain weight easily/put on weight easily/become fat easily

4．Different people used very different amounts of energy for breathing. Some people burned 1067 calories per day while others burned up to 3015 calories per day.

5．这些不同种类组合的例证之一就是某一基因家族，该家族使体内多余的脂肪转化成热量而不是将其储存在体内。