________ firmly on the wound to stop the bleeding.
A. Push
B. Press
C. Pull
D. Put
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Please don't ________ me while I'm on the phone
A. cut
B. invade
C. interrupt
D. intrude
He called them several times to ________ about job possibilities.
A. inquire
B. inform
C. acquire
D. attach
I could not bear to enter a laboratory, and the sight of any chemical equipment made me ________ with fear.
A. swing
B. shake
C. tremble
D. dangle
直流负反馈的目的是稳定()态工作点
A. 静
B. 动