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
参考答案:B
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
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