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【单选题】
设 的联合分布律为 X Y -2 -1 0 -1 0 3 0 则 Z=X-Y的分布律为 ( )A.
X-Y -1 0 1 3 5 P
B.
X-Y -1 0 1 3 5 P
C.
X-Y -1 0 2 3 5 P
D.
X-Y -1 0 1 3 5 P
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【单选题】听力原文：M: Shall I call a taxi? W: But the grand hotel is only two blocks away. M: Well, you're right. How will the speakers probably go to the hotel?
A.
By taxi.
B.
On foot.
C.
By bus.
【简答题】I shall answer your question after class .
【单选题】I shall answer your question after class. 请指出“shall answer”在句中的成分。
A.
谓语
B.
定语
C.
状语
D.
补语
【单选题】We shall provide such insurance at your cost.
A.
We shall pay for the insurance for you.
B.
You shall pay for the insurance for yourself.
C.
Both of us shall pay for the insurance.
【单选题】I shall be very pleased to answer any questions you may have.
A.
happy
B.
sad
C.
prepared
D.
determined
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