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【单选题】
控制器负作用时，其放大系数Kc满足（）A.
Kc<0< /div>
B.
Kc
C.
Kc>0
D.
Kc=0
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【简答题】Most of us know we should cut down fat, but knowing such things isn’t much help when it____shopping and eating. A refers to B. speaks of C. focuses on D. comes to
【简答题】迈腾B8L车灯旋转开关近档,左侧近光灯不亮,右侧正常,下列哪项是可能原因?A. 大灯旋转开关1号线断路 B. 大灯旋转开关4号线对地短路 C. 左侧近光灯6号线断路 D. J519内部线路损坏
【单选题】Our teacher is coming. Please stop _______ and keep _______. [ ]
A.
talking; quiet
B.
to talk; quiet
C.
talking; quietly
D.
to talk; quietly
【单选题】Most of us know we should cut down on fat, but knowing such things isn’t much help when it ________ shopping and eating.
A.
speaks of
B.
refers to
C.
comes to
D.
focuses on
【单选题】____ quiet, for, you see, the baby is sleeping!
A.
To keep
B.
Keep
C.
Keeping
D.
Kept
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