题目内容

Do you agree or disagree: people would meet many problems in their daily life and they would solve them by themselves or from the help of their families; the help from the government is not necessary？

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房间气流组成合理，有害物源均匀地散发有害物，把这些有害物稀释到卫生标准浓度以下所需的风量称全面通风量。()

Do you agree and disagree with the following statement？
It is difficult for teachers to be both popular (well-liked) and effective to help students learning.

建筑排水系统的通气管主要是用来排气的。()

金属卤化物灯属于热辐射光源的一种。()