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问题
单项选择题
化学消毒剂的使用方法中,不包括下列哪项()
A.浸泡法
B.煮沸法
C.擦拭法
D.喷雾法
E.熏蒸法
答案
参考答案:
B
选择题
A tsunami (海啸) _____ in some southern Asian countries in December, 2004. _____ homeless people had to stay in the open air.
A. has happened; Thousands of
B. happened; Thousands of
C. has happened; About twelve thousand of
D. happened; Twelve thousands
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名词解释
旋流燃烧器的气流结构特性
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