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【单选题】
Endorsement can be made at the airline's direct ticket office or at the ______.
A.
airport
B.
travel agency
C.
airline office
D.
airline counter
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参考答案:
举一反三
【简答题】We have days and nights because of _____of the earth.
【简答题】We have problem with evaluating risk partly because ______.
【单选题】企业赞助希望工程的活动属于
A.
赞助文化事业
B.
赞助教育事业
C.
赞助福利事业
D.
赞助艺术事业
【单选题】We may have dreams because we have needs that are  _____  in our daily lives.
A.
unknown
B.
undone
C.
unborn
D.
unmet
【判断题】若要产生二进制相移键控 2PSK信号,则基带信号不一定为双极性不归零波形,这一说法是( )。 C. 不确定
A.
正确
B.
错误
【简答题】Because we human beings have sophisticated and personalized brains, we have the notion of self.
【单选题】企业支持希望工程的活动属于()。
A.
赞助文化事业
B.
赞助教育事业
C.
赞助福利事业
D.
赞助受灾地区
【单选题】We have no time to have a rest on Sundays, because ourteachers _______ us do a lot of homework.
A.
. tell     
B.
. get      
C.
. ask  
D.
. have
【单选题】We can't go home _____ the heavy rain and we have to wait _____ it stops. [     ]
A.
because; or
B.
because of; until
C.
because; but
D.
because of; for
【单选题】若要产生二进制相移键控 2PSK信号,则基带信号不一定为双极性不归零波形,这一说法是( )。
A.
正确
B.
错误
C.
不确定
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