双绞线的接口是RJ45水晶头。
A. 对
B. 错
My train ______ at 8 o’clock tomorrow morning. Will you come to see me off?
A. leaves
B. will have left
C. is left
D. will be left
We congratulated him on ______ chairman.
A. his elected
B. his electing
C. his being elected
D. his is elected
The reason ______ Mr. Robinson did not arrive in Shanghai as scheduled was that his flight was called off because of the bad weather.
A. when
B. why
C. which
D. where
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