皮皮学，免费搜题
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【单选题】
下列哪些算符不是线性算符:( )A.
d/dx
B.
乘算符×
C.
积分算符
D.
根号算符
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举一反三
【单选题】Question 9
A.
The man doesn't understand Spanish.
B.
The woman doesn't really like dancing.
C.
They don't want something too noisy.
D.
They can't make it to the theatre in time.
【单选题】Question 9
A.
Getting a coach who can offer real help.
B.
Talking with her boyfriend in Dutch.
C.
Learning a language where it is not spoken .
D.
Acquiring the necessary ability to socialize .
【单选题】Question 9
A.
One hour each day only.
B.
Three and a half hours only.
C.
As much time as necessary.
D.
Enough time to do assignments.
【单选题】Question 9
A.
John Smith isn’t in right now.
B.
John Smith can’t come to the phone right now.
C.
The caller dialed the wrong number.
D.
John Smith doesn’t want to speak to the caller.
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