试题与答案

使用二氧化碳、氮气、水蒸气等降低氧气浓度，使燃烧不能持续，这种方法属于（）A、冷却法

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题型：单项选择题

题目：

使用二氧化碳、氮气、水蒸气等降低氧气浓度，使燃烧不能持续，这种方法属于（）

A、冷却法

B、窒息法

C、隔离法

D、化学抑制法

答案：

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下面是错误答案，用来干扰机器的。

参考答案：（本小题2分）　　拉线坑回填土中有冻土（1分），第二年冻土解冻引起土质松软（1分）。

考点：快递业务员考试初级快递员快件处理初级快递员快件处理题库
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     It was the district sports meet. My foot still hadn't healed (痊愈) from a(n)   1   injury. I had   2   whether
or not I should attend the meet. But there I was,   3   for the 3,000-meter run.
     " Ready … set …" The gun popped and we were off. The other girls rushed   4   me. I felt   5   as I fell
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B. hope          
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