仪器仪表的维护存放措施,错误的是()。A、轻拿轻放 B、棉纱擦拭 C、放在强磁场周围

题型:单项选择题

问题:

仪器仪表的维护存放措施,错误的是()。

A、轻拿轻放

B、棉纱擦拭

C、放在强磁场周围

D、放在干燥的室内

考点:仪表工考试初级仪表工初级仪表工题库
题型:单项选择题

下列判断正确的是(  )

A.零减去一个数仍然是这个数

B.两个有理数积的绝对值一定等于绝对值的积

C.符号不同的两个数叫作互为相反数

D.一个数平方之后比自身大

题型:单项选择题

在信令数据链路的两种连接方式中,()可通过人机命令将PCM传输系统的任一时隙作为信令链路使用。

A.虚拟连接方式

B.时隙插入方式

C.半永久连接

D.固定连接方式

题型:单项选择题

电网为三相四线制中线接地,电气设备外露金属部分单独直接接地而不与中线相连,这样的系统叫做( )。

A.TT系统

B.IT系统

C.TN-C系统

D.TN-S系统

题型:单项选择题

根据所给词的适当形式填空。

小题1:90% of the class enjoyed ____________ (he) during the winter holiday.

小题2:It is______________ (possible)for me to design the poster without your help.

小题3:The police ________ (search) the robber at that time last night.

小题4:When I got to the theater, I realized that I _________ (leave) the ticket at home.

小题5:December is the __________ (twelve) month of a year.

小题6:You'd better plan your free time ________(wise). Don't play too many computer games.

小题7:——What do your father and uncle do?

——They are __________ (salesman) and they sell all kinds of robots.

小题8:——I want to teach in the western areas.

——Well, teachers ____________ very much there. (need )

小题9:Look! There is a new ___________ (wash) machine near the window.

小题10:My cousin refused ___________ (keep) secrets for me.

题型:单项选择题

恩佑寺原为________书屋,________即位后,将书屋改建为恩佑寺。

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