单选题
644、 如果过滤器发生堵塞,应送去实验室分析污染情况
A
If the filters become clogged, send them to the laboratory for analysis of the contamination.
B
lf the filters are surged, send them to laboratory for contamination analysis
C
lf the contaminant is blocking the filter the material should be sent to the laboratory for analysis’s
答案解析
正确答案:A
