试题与答案

节材要求施工现场()km以内生产的建筑材料用量占建筑材料总量的70%以上。 A.10

题型:单项选择题

题目:

节材要求施工现场()km以内生产的建筑材料用量占建筑材料总量的70%以上。

A.100

B.200

C.500

D.1000

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:氯化物检查的反应条件是稀硝酸;硫酸盐检查的反应条件是稀盐酸;铁盐检查的反应条件是盐酸;重金属检查的反应条件是醋酸盐缓冲液(pH3.5);砷盐检查的反应条件是盐酸。

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据2008年11月6日报道,受全球金融海啸影响,中国千万农民工返乡拉响经济警报,中国沿海地区不少工厂停工,近千万民工提前返乡,据此回答:

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C.宇航、卫星、飞机

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