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【单选题】
开展以动物为研究的被试时,下列表述不正确的有( )
A.
给动物以人道对待
B.
为保证实验顺利进行,动物解剖时可需使用麻醉剂
C.
获取、照料、使用和处理动物以符合实验设计要求为主
D.
当动物生命结束时,需要快速且无痛
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【单选题】如图所示,此时游标卡尺的主尺读数是( )
A.
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