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【单选题】
若补码用8位二进制数表示,则可标识的最大正数是( )A.
2 8
B.
2 8 -1
C.
2 7
D.
2 7 -1
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反馈参考答案：
举一反三
【单选题】I would have written before, but I______ ill.
A.
was
B.
would been
C.
had been
D.
were
【简答题】接触器在正常状态下断开，通电后即闭合的触点称为（）触点，又称常开触点，而在通常状态下闭合，通电后就断开的触点，称作（）触点，又称常闭触点。
【单选题】I would have written before, but I______ill.
A.
have been
B.
would been
C.
had been
D.
were
【单选题】________ your blog, I would have written back two days ago.
A.
If I read
B.
Should I read
C.
Had I read
D.
If I could have read
【单选题】I would have written before, but I ______ ill.
A.
were
B.
had been
C.
would be
D.
was
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