压力开关正常时为,异常报警时为()A、常闭状态,关闭状态 B、常闭状态,断开状态 C

题型:单项选择题

问题:

压力开关正常时为,异常报警时为()

A、常闭状态,关闭状态

B、常闭状态,断开状态

C、常开状态,闭和状态

D、常开状态,断开状态

考点:采油工考试海上采油工程仪表初级海上采油工程仪表初级题库
题型:单项选择题

动词填空(写出所给的动词的适当形式)(共5小题;每小题1分,满分5分)

小题1:Seventy-two hours passed . More than one hundred workers remained _____________(trap) in the coal mine, though fifty had been saved.

小题2:_____________________(determine) to get a seat for the concert, he didn’t mind standing in a queue all night.

小题3:The bad weather is reported _____________________(contribute) to the passenger plane crash in Iran on January 9.

小题4:__________________ (experience) many failures, I have the courage to meet all challenges.

小题5: _________________ (examine) twice a year, whether it is a car or a bus or a truck, is the rule that every driver shall obey in this city.

题型:单项选择题

起自骨盆缘的结构是()。

A.卵巢固有韧带

B.卵巢系膜

C.输卵管系膜

D.卵巢悬韧带

E.子宫圆韧带

题型:单项选择题

理论联系实际就要( )。

A.认真读书、刻苦学习马列主义

B.分析解决面临的实际问题

C.联系当代世界的深刻变化

D.联系我国社会主义初级阶段的基本国情

题型:单项选择题

下列化学用语中正确的是(  )

A.乙烯的结构简式为CH2CH2

B.羟基的电子式:

C.乙酸的官能团:-COOH

D.二甲醚的分子式:CH4O

题型:单项选择题

,()

A.

B.

C.

D.

更多题库