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单选题
274、如果过滤器在异常短的时间后堵塞,将它们送到实验室进行污染分析。
A
When the filters become blocked unconventionally after a very short time, send them to the lab for calculation of the contamination.
B
If the filters become clogged after an unusually short time, send them to the laboratory for analysis of the contamination.
C
When the filters become clogged in an abnormal short time, send them to the library to analyze the contamination.
答案解析
正确答案：B
解析：
解析:calculation 计算; analysis=analyze 分析。laboratory 实验室;library 图书馆。
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