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【简答题】
解释“并行传输”和“串行传输”的概念,并指明两者的区别。
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【单选题】Lots of people go shopping on Saturdays and the shops are really ________.
A.
interested
B.
worried
C.
bored
D.
crowded
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【单选题】------There are lots of people in the street. What happened ? ----- go and have a look ?
A.
Why don’t
B.
Why not
C.
How about
D.
What about
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