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问题 解答题

动物所进行的一系列有利于它们生存和繁殖后代的活动，都是动物的行为．______．（判断对错）

答案

动物所进行的有利于它们存活和繁殖后代的活动都是动物的行为．动物的行为常表现为各种各样的运动，动物的运动依赖于一定的身体结构，如高等动物的运动系统．

故答案为：√．

填空题

六一散的组成药物有（）、（）。
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单项选择题

A child is sent to the school nurse because, according to his teacher, he’s constantly scratching his head. When the nurse assesses his hair and scalp, she finds evidence of lice. What did she probably see（）

A. Flaking of the scalp with pink, irritated skin exposed.

B. Small white spots that adhere to the hair shaft, close to the scalp.

C. Scaly, circumscribed patches on the scalp, with mild alopecia in these areas.

D. Multiple tiny pustules on the scalp with no abnormal findings on the hair shafts.
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