截止阀的密封是通过阀杆上的阀瓣以平面与阀座密封圈座贴紧来实现_爱下问搜题

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问题判断题

截止阀的密封是通过阀杆上的阀瓣以平面与阀座密封圈座贴紧来实现的。

答案

参考答案：错

选择题

看图，选择对应的图片。

( ) 1.	a. chair
( ) 2.	b. book
( ) 3.	c. boy
( ) 4.	d. girl

单项选择题

Besides______, he had to pay back all the money he had received from bribes.

A．jailing

B．being jailed

C．to be jailed

D．jailed