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【单选题】
气动比例微分调节器如图5-21所示。当系统处在平衡状态时,测量波纹管与给定波纹管内的压力是 。A.
测量值大于给定值
B.
测量值小于给定值
C.
测量值等于给定值
D.
测量值有时大于给定值，有时小于给定值
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举一反三
【单选题】The artistic effect of shadow play is produced through light, puppetry, screen and _______.
A.
singing
B.
words
C.
colors
D.
stage
【单选题】How good a shadow play is depends on the ______ and the handling of the puppets.
A.
dancing
B.
playing
C.
singing
D.
making
【判断题】How good a shadow play is depends on the singing and the handling of the puppets.
A.
正确
B.
错误
【判断题】How good a shadow play is depends on the singing and the handling of the puppets.
A.
正确
B.
错误
【判断题】The shadow play is in fact the world’s earliest “movie art” with the accompaniment of human voice.
A.
正确
B.
错误
【单选题】_________good a shadow play is depends on the singing and the handling of puppets.
A.
What
B.
That
C.
How
D.
Which
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