It is ______ that he know how to use the computer in his work. ( )(本题2.0分) A、 positive B、 primary C、 desirable D、 particular

It is ______ that he know how to use the computer in his work. ( )(本题2.0分)
A、 positive
B、 primary
C、 desirable
D、 particular

出自：华北水利水电大学混凝土结构设计原理

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