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【单选题】
The country has already sent up three unmanned spacecraft, the most recent ________ at the end of last March.
A.
has been launched
B.
having been launched
C.
being launched
D.
to be launched
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举一反三
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C
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A.
Oh,my compuer is down.
B.
It doesn't matter.
C.
I think it's OK.
D.
Never mind.
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【单选题】I was on __________ last week and didn't receive your fax.
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vacation
B.
vocation
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禁止驶入
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【单选题】电流表的符号是( )
A.
A
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欧姆
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V
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【单选题】电流表的符号是()。
A.
Ω
B.
A
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V
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【单选题】电流表的符号是。
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无
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【单选题】I ______ a letter from him since he left. [     ]
A.
didn't receive
B.
haven't got
C.
didn't have
D.
haven't had
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【单选题】I______ from him since he left. A. didn't receive B. haven't got C. didn't have D. haven't heard
A.
didn't receive
B.
haven't got
C.
didn't have
D.
haven't heard
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D.
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