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【单选题】
At no time ______ what was happening.A.
the President was aware of
B.
the President was aware about
C.
was the President aware of
D.
was the President aware on
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【单选题】( )的作用是控制系统中的压力基本恒定,实现稳压、调压或限压。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
溢流阀
B.
节流阀
C.
顺序阀
D.
单向阀
【单选题】For over a million years, our forefathers were basically______.
A.
skillful sportsmen
B.
successful farmers
C.
runners and jumpers
D.
cooperating hunters
【简答题】A．Over a million abandoned cars are towed from the streets each year. B．One third of the nation's cars are abandoned in the streets. C．About two thirds of the abandoned cars aren't removed. D．Cities s...
【单选题】As a result of the radio ______for help for the earthquake victims. over a million pounds has been raised.
A.
appeal
B.
call
C.
program
D.
advertisement
【单选题】For over a million years, our forefathers were basically ______.
A.
cooperating hunters
B.
successful farmers
C.
runners and jumpers
D.
skillful sportsmen
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