在传染病的流行期间，为保护易感人群，下列不属于主动免疫的是（_爱下问搜题

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问题单项选择题 A1型题

在传染病的流行期间，为保护易感人群，下列不属于主动免疫的是（）

A.DNA疫苗

B.减毒活疫（菌）苗

C.抗毒素

D.灭活疫（菌）苗

E.类毒素

答案

参考答案：C

完形填空

完形填空
It is commonly believed that school is where people go to get education. _1 , it has been said that today children _2 their education to go to school. The _3 between schooling and education suggested by this is important. Education is _4 , compared with schooling. Education knows no _5 . It can take place _6 , whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the _7 learning that takes place in schools and the whole universe of learning out of class. 8_ the experience of schooling can be known in advance, education quite often produces _9 . A chance talk with a 10 may lead to a person to discover how 11 he knows of another country. People obtain education from 12 on. Education, 13 , is a very 14 and unlimited term. It is a lifelong experience that starts long 15 the start of school, and one that should be a necessary part of one's entire life. Schooling, on the other hand, is a 16 experience, whose style changes 17 from one way to the next. Throughout a country, children arrive at school at the same time, take 18 seats, use similar textbooks, do homework, and 18 , and so on. Schooling has usually been 20 by the edges of the subjects being taught.
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单项选择题

肾母细胞瘤最常见的经血转移部位是()

A．脑

B．肝

C．肺

D．骨

E．肠