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[主观题]
[A] sometimes[B] up and down[C] someday[D] here and there
[A] sometimes
[B] up and down
[C] someday
[D] here and there
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[A] sometimes
[B] up and down
[C] someday
[D] here and there
第6题
A.高分液位控制阀改自动操作,稳定高分罐液位
B.高分液位控制阀改副线操作,提高高分罐压力
C.高分液位控制阀改手动操作,稳定高分罐液位
D.高分液位控制阀改手动操作,提高低分罐压力
第7题
A.热高分液位正常但热高分压力下降,热低分压力急剧上升
B.热高分液位正常但热低分出口流量上升
C.热高分液位正常但热低分温度急剧上升
D.热高分液位正常但冷高分液位下降
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