再生器喷燃烧油流程有喷燃烧油喷嘴雾化蒸汽和管线吹扫蒸汽，启用_爱下问搜题

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问题单项选择题

再生器喷燃烧油流程有喷燃烧油喷嘴雾化蒸汽和管线吹扫蒸汽，启用喷燃烧油时，管线吹扫蒸汽阀门须（）。

A、全开

B、全关

C、开1/2

D、根据喷燃烧油流量大小调节开度

答案

参考答案：B

选择题

The population of our village was ____ that of theirs.

A．as twice large as

B．twice as large as

C．twice as much as

D．as twice much as

单项选择题

均布荷载作用下的简支梁，( )弯矩最大。

A．跨边处

B．1/4跨处

C．跨端处

D．跨中处