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问题 单项选择题

根据《建筑设计防火规范》厂房（仓库）的耐火等级与构件的耐火极限规定，（）级耐火等级厂房（仓库）的上人平屋顶，其屋面板的耐火极限不应低于1.50h。

A.一

B.二

C.三

D.四

答案

参考答案：A

问答题

Passage Translation 2If your great grandparents were born in a rich country in the early 1900s, their lifespan would have been about 50. Today people in developed countries have a life expectancy of 80 or more. This is because the improvements of public health, such as running water and flushing toilets and then medical care. But these improvements have mostly benefited richer nations. There are still places in the world that don’t have clean water, enough food and enough doctors. So people there often suffer from famine and disease.
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判断题

钢筋焊接网交叉点开焊数量不应超过整张网片交叉点总数的2%。( )
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