78、差动放大电路能放大( )。
A. 直流信号
B. 交流信号
C. 共模信号
D. 差模信号
Mary is _______ than Alice.
A. More experienced a teacher.
B. A more experienced teacher
C. More an experienced teacher
D. More experienced teacher.
I put him down for a well-educated man.- _________- I mean that he’s a well-educated man.
A. I beg your pardon
B. Speak louder, will you
C. What’s that
D. Will you repeat word for word.
He ____ he would be able to leave tomorrow, but it’s beginning to took difficult.
A. Hopes
B. Was hoping
C. Had hoped
D. Hoped
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