问题 单项选择题

下列属于人工主动免疫的是()

A.注射丙种球蛋白预防麻疹

B.接种卡介苗预防结核

C.注射免疫核糖核酸治疗恶性肿瘤

D.静脉注射LAK细胞治疗肿瘤

E.骨髓移植治疗白血病

答案

参考答案:B

解析:人工主动免疫是用疫苗接种机体使之产生特异性免疫,从而预防感染的措施。

阅读理解

阅读理解。

     A good way to pass an exam is to work hard every day in a year. You may fail in an exam if you are

 lazy for most of the year and then work hard only a few days before the exam. If you want to be good at

  English,   you have to read stories in English and speak English as much as possible.

    A few days before the exam you should go to bed early. Do not go to bed late at night studying. Before

  you start the exam,   read carefully over the question papers,  try to understand the exact meaning of each

  question. When you have at last finished your exam,  read over your answers. Correct the mistakes if

 there are any and be sure that you have not missed anything out.      

1. If people want to do well in an exam,   they have to work hard _____. 

    A. every day in a year

    B. for most of the month

    C. for only a few days

2. If people want to learn English well,  they _____.

    A. only need to learn grammar

    B. must often practice English

    C. have to go to England

3. It's important to _____ a few days before  the exam.

    A. play too much

    B. have a good sleep

    C. have a good drink

4. When people have finished the exam,  they should _____ .

    A. stand and leave at once

    B. answer a few more questions

    C. make sure that they have not missed anything out   

5. The best title for this passage is "_____ ".

    A. An Important Exam

    B. How to Pass an Exam

    C. Get Ready for an Exam

单项选择题