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【判断题】
进行腐蚀运算后,图像比。
A.
正确
B.
错误
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【单选题】连接计算机到集线器的双绞线最大长度为
A.
10m
B.
100m
C.
500m
D.
1000m
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A.
should
B.
will
C.
must
D.
can
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【单选题】It is_____cold in November.
A.
never
B.
seldom
C.
hardly ever
D.
Often
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