题目内容

舍内空气流动的速度和方向，主要决定于畜舍结构的严密程度和畜舍的通风。()

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As is known to all, there are many forms of energy, ______is solar energy.

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B. one of whom
C. which of one
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一个善于吸收辐射能的物体，亦必是一个善于发射的物体。()

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相对而言，潮湿空气有利于空气中细小颗粒物的积聚，从而可降低舍内粉尘浓度减少呼吸道疾病。()