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问题 多项选择题

关于联动试运行的安全要求，以下正确的是（）

A、试运行人员必须按建制上岗，服从统一指挥

B、必须按照试运行方案及操作规程精心指挥和操作

C、联动试运行前应划定试运行区域，无关人员不得进入

D、不受工艺条件影响的仪表、保护性联锁、报警皆不应参与试运行

答案

参考答案：A, B, C

单项选择题

Electronic mail and filing permit a user to compose and transmit a message on an office (71) system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format (72) , several hundred different computers and electronic mail interfaces are specification of how (73) and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what (74) of characters are required at the (75) of a message to identify the sending and receiving mailboxes.

A．protocols

B．standards

C．roles

D．principles
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问答题 简答题

洗衣的目的是什么？
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