（）蒸汽是压力大于70kPa的蒸汽。 A.高压 B.中压 C.低压 D.恒压_爱下问搜题

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问题单项选择题

（）蒸汽是压力大于70kPa的蒸汽。

A.高压

B.中压

C.低压

D.恒压

答案

参考答案：A

选择题

—Why do you look sad?

—There are so many problems .[ ]

A. remaining to settle

B. remained settling

C .remaining to be settled

D. remained to be settled

单项选择题

锚杆孔位允许偏差为( )mm。

A．±5
B．±10
C．±15
D．±20