题目内容

漩涡流量计安装时,应保证流量计于管道同轴,连接法兰的对中误差应小于()D。

A. 0.01
B. 0.02
C. 0.1
D. 0.2

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尾煤跑粗的主要原因有()。

A. 给矿量大,浮选时间不足
B. 浮选入料中细粒含量多
C. 浮选入料浓度太大
D. 充气搅拌不足,煤粒浮不起

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我国财务会计报告的责任主体是()。

A. 总会计师
B. 单位领导人
C. 单位负责人
D. 会计机构负责人

Which of the listed statements is correct concerning refrigeration systems?()

A. Dehydrators must be used continuously in a refrigeration system
B. A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours
C. A thermostatic expansion valve is used to control refrigerated space temperature
D. The liquid receiver functions to collect and remove non- condensable gase

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