问题
单项选择题
矿井需要的风量计算确定原则是()。
A.根据计算要求分别得到结果后，选取其中的最小值
B.根据计算要求分别得到结果后，选取其中的最大值
C.根据计算要求分别得到结果后，选取其中的平均值
D.根据计算要求分别得到结果后，选取其中的最大值的2倍
答案
参考答案：B
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矿井需要的风量计算确定原则是()。
A.根据计算要求分别得到结果后，选取其中的最小值
B.根据计算要求分别得到结果后，选取其中的最大值
C.根据计算要求分别得到结果后，选取其中的平均值
D.根据计算要求分别得到结果后，选取其中的最大值的2倍
参考答案：B
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| Most adults once studied at school, had classes and did homework every day. The same _1 is going on at school now. _2_it seems that doing weekend homework is 3_problem for the modern students. All the students should agree that weekend homework should be abolished (取消). It's 4 for them studying at school five days a week. They have a lot of interests. With homework to do on Saturday and Sunday, when can they find 5 to help around the house, go and see a football or basketball game or a good film, join in family recreations (娱乐), or just have 6 at home? Because of these other activities, the homework can not be finished until _7 . So their weekend homework is usually done in such a hurry that on Monday the 8 teachers often threaten (威胁) to fail whole class of students because they know nothing about the _9 . If there were no weekend homework for the students to do, they would be happy to school on Monday 10_having a good rest and to learn what the teachers teach. | ||||
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