His success was due to the fact that he had been working hard.
A. 主语从句
B. 表语从句
C. 宾语从句
D. 同位语从句
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He is a good student except that he is occasionally careless.
A. 主语从句
B. 表语从句
C. 宾语从句
D. 同位语从句
I have no idea how soon they are coming.
A. 主语从句
B. 表语从句
C. 宾语从句
D. 同位语从句
It is a wonder that he got the first prize.
A. 主语从句
B. 表语从句
C. 宾语从句
D. 同位语从句
A,B,C为相互独立的三个事件，若P(A)=P(B)=P(C)=0.3，则P(A∪B∪C)的值为
A. 0.9
B. 0.3
C. 0.27
D. 0.657
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