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【判断题】
为了让学生对问题有准确的把握，发问复述几遍。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】要求用纸作答,给出详细过程,并拍照上传。 (1)将以下补码转换为十进制数 1111 10111 (2)用二进制补码形式计算以下2题。 -11-7 11-9
【单选题】Passengers on board aren't allowed _____ calls during take-off．
A.
making or receiving
B.
to make or receive
C.
to have made or received
D.
having made or received
【单选题】_______ has been announced, our government will take more measures to make the falling economics recover as soon as possible.
A.
That
B.
As
C.
It
D.
What
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