根据基因工程的目的,基因载体可分为()和()。

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问题:

根据基因工程的目的,基因载体可分为()和()。

考点:普通考研07理学2009年青岛大学845生物化学考研试题
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协议回购,是指公司以协议价格直接向几个主要股东回购股票。( )

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C

A car needs gas to run as your body needs food to work for you. Eating the right kinds of food is very important. A good eating habit can help your body grow strong if you take care of what you eat.

There are four main food groups altogether. The dairy group has food like milk, cheese and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at least one food from all four main groups. With all of these foods together, you will be given enough energy during the day.

It is easy to get into bad eating habits. You may eat your breakfast in a hurry to get to school on time or you may not have time for a good lunch. It may be easier to eat fish and chips for your supper all the time. But you will find yourself tired and you will not be able to think quickly.

Watching what you eat will help keep your body healthy and strong. It is also good to take some exercise. It will help you eat more if you take a walk or play games in the open air. Having good eating habits with some exercise is the key to your health.

69. According to the passage, which of the following diets do you think is the best one?

A. Eggs, tomatoes and chicken.          B. Milk, bread, cabbages and beef.

C. Corn, fish, ice cream and pork.        D. Rice, beancurd, fish and chicken.

70. In this passage the writer mainly tells us that ______.

A. every person needs food to grow well

B. taking exercise can keep your body strong

C. the right kind of food with exercise will keep you healthy

D. enough energy helps people think more quickly

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下列物品中属于导体的是(  )

A.铅笔芯

B.塑料尺

C.橡皮

D.胸卡

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错综

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不承认自己患病而不配合治疗的病人属于()

A.角色行为缺如

B.角色行为消退

C.角色行为冲突

D.角色行为强化

E.角色行为适应

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