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【多选题】
下列通讯速率属于RS-232的是( )。A.
50
B.
60
C.
75
D.
100
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举一反三
【单选题】What does the author say about the effect of nicotine on smokers?
A.
It threatens their health.
B.
It heightens their spirits.
C.
It suppresses their appetite.
D.
It slows down their metabolism.
【单选题】--what effect does the medicine have the blood pressure ? --- well ,it depends how much you take .
A.
with ;on
B.
with ; to
C.
on ; on
D.
on ; to
【简答题】What does it effect?
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