由于压缩空气压力高、气量大,装置停车后用压缩空气置换可加快速度。A.正确B.错误

由于压缩空气压力高、气量大,装置停车后用压缩空气置换可加快速度。A.正确B.错误

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当气压信号增大时,阀门开度关小的调节阀属于()调节阀。A.气开式B.气关式C.正作用D.反作用

当气压信号增大时,阀门开度关小的调节阀属于()调节阀。A.气开式B.气关式C.正作用D.反作用

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It was _______ who helped Tom out when he was in trouble. A.IB.meC.usD

It was _______ who helped Tom out when he was in trouble. A.IB.meC.usD.ours

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I remember _______ her at the party lastweek.A.to meetB.meetingC.havin

I remember _______ her at the party lastweek.A.to meetB.meetingC.having metD.to have met

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“Would you be_________do it for me,please?”“Ofcourse,withpleasurE.”A.k

“Would you be_________do it for me,please?”“Ofcourse,withpleasurE.”A.kind enoughB.as kind toC.SO kind as toD.so kind to

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