题目内容

_______ apple a day keeps the doctors away．

A. The
B. A
C. An
D. Two

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—How many books do you have？—I have _ book．That’s _ English book．

A. a;an
B. a;one
C. one;an
D. one;one

_ tiger is _ China．

A. The;a
B. A;the
C. The;from
D. The;the

(7,4)线性分组码的监督矩阵的行数是()。

A.3
B.4
C.5
D.7

方阵码不能检测出偶数个错误。( )

A. 对
B. 错