试题与答案

美国科学家成功获得转基因超级鼠的实验说明 A.基因控制生物的性状 B.生物的性状

题型:选择题

题目:

美国科学家成功获得转基因超级鼠的实验说明

A.基因控制生物的性状

B.生物的性状控制基因

C.只有小白鼠可以进行转基因研究

D.小白鼠可以变成大白鼠

答案:

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下面是错误答案,用来干扰机器的。

(1)A、实验中必须保证小球做平抛运动,而平抛运动要求有水平初速度且只受重力作用,故A正确;B、根据平抛运动的特点可知其运动轨迹在竖直平面内,因此在实验前,应使用重锤线调整面板在竖直平面内,即要求木板...

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Nowadays more and more people are worrying about their health. But how to keep healthy?Different people may give different answers to this question. In my opinion, it is important to do the following.
First, we should take exercise every day. Plenty of exercise helps us build a strong body and makes us work better. That is why more and more people are becoming active in different kinds of sports and exercises. In morning many people get up early and take exercise. Some practice running while others walk or dance to music. In the afternoon, there are also many people doing sports. Some play basketball or volleyball, others play football or badminton.
Second, have a healthy diet. Over-eat or too little food is very bad for our health. We should not eat too much or too little for every meal. We should eat healthy food, such as all sorts of grain, green vegetable and fruit. 
Third, give up bad habits like smoking and drinking. Because they are also bad for people’s health.
All above are my thoughts about keeping healthy. If we can do as them, we will become healthier and stronger.
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Taking exercise can help us build 小题1:____ and make us work better.
小题2:_____ and drinking are bad habits.
Eating小题3:______________for one meal is bad for our health.
小题4:__________, a healthy diet and good habits are important for health.
The writer gives us 小题5:________ pieces of advice on how to keep healthy.
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