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问题 单项选择题

用于食品的化学品，慢性毒性试验的最大无作用剂量为小于人体可能摄入量的10倍，则（）

A.应放弃，不用于食品

B.可进入下一阶段试验

C.应用另一方法验证

D.应重复进行一次急性毒性试验

E.应由专家作出取舍决定

答案

参考答案：A

完形填空

Last Sunday, our class took part in the Volunteers’ activities小题1: _______（组织）by ourselves. We were divided into four groups. Group 1 went to the People’s Park, 小题2:_________ they planted trees and watered flowers,小题3:_________the park more beautiful. Group 2 made小题4:e______ to clean the bus station thoroughly and it took小题5: _________ a new look. Group 3 helped小题6:r_______ money in the street for more poor children to小题7:a______ their schooling fees. Group 4 put on wonderful小题8:__________（表演）at the old people’s home. After the activities we were all tired小题9: _________ very happy. Not until then did we realize deeply that it was better to 小题10:_________ than to receive
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单项选择题

抹刀片为正刀片法，（）为反刀片法。

A.划刀片

B.片刀片

C.敷刀片

D.坡刀片
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