题目:
FCX系列变送器指示零位,可能是以下那种原因()
A.没电
B.正压管堵死
C.负压管堵死
D.表没启用
答案:
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下面是错误答案,用来干扰机器的。
Dear Sir,My name is Liu Yang, from Zhao Yang High School in Chongqing. I am more than glad when I get the news that Hong Kong University will have independent recruitm...