搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1/A2型题

我国规定输血相关传染病检测试剂盒进入市场必须（）。

A.经中国药品生物制品检定所检验合格，实行批签发

B.经中国药品生物制品检定所检验合格，实行年签发

C.经中国药品生物制品检定所检验合格，实行月签发

D.经中国食品药品检定研究院检验合格，实行批签发

E.经中国食品药品检定研究院检验合格，实行年签发

答案

参考答案：A

解析：我国规定HBsAg、HCV抗体、HIV抗体和梅毒等输血相关疾病检测试剂盒必须经中国药品生物制品检定所批签合格才能进入市场。批签发检验或者审核的标准为现行的国家生物制品规程。

问答题

定位轴线有什么作用
查看答案
单项选择题

It is clear that some chemicals can damage the health of animals and humans. (1) , this is not the only problem that (2) be caused by the careless use of chemicals. Chemicals can also (3) the ecological balance of the environment. If the ecological balance is disturbed, the results can be (4) serious.The (5) of DDT illustrates the problem. DDT, a chemical which kills insects, at first seemed to be a perfect answer (6) many problems. It would control insects that caused dangerous diseases, (7) insects that caused billions of dollars of damage to crops every year. Governments permitted and even (8) the use of DDT. Farmers in many countries (9) to spray it on their crops. The (10) results were good. Damage to crops (11) down, and profits went up. However, the chemical had effects which the scientists didn’t see in (12) . First, it also killed insects which were the (13) enemies of the harmful insects and which were therefore beneficial to farmers. Second, and perhaps worse, DDT did not kill (14) harmful insect. A few insects had natural resistance to the chemical. They (15) and reproduced in large numbers. In a few years there were large numbers of insects which were not (16) by DDT, and there were (17) insects which Could act as natural (18) on these new "super-insects". Finally, it became clear that DDT was not solving the insect problem. In fact, it was making the problem worse. It (19) became necessary to find a second (20) for the effects of the first.

第（17）空应选择（）

A.many 

B.a few 

C.a little 

D.fewer
查看答案