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【单选题】
eLTE-IoT 通过( )技术实现在免授权频谱上的可靠连接?A.
快递
B.
功率谱密度提升
C.
跳频技术
D.
PSM
手机使用
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反馈参考答案：
举一反三
【单选题】In order to find the missing child, villagers all they can over the past five hours.
A.
did
B.
do
C.
had done
D.
have been doing
【单选题】In order to find the missing child，villagers ________ all they can over the past five hours.(2012·安徽)
A.
did
B.
do
C.
had done
D.
have been doing
【多选题】Which of the following aspects need to be given in order to find the lost luggage?
A.
your flight number
B.
your age
C.
description about your luggage
D.
your contact number or address
【多选题】Which of the following aspects need to be given in order to find the lost luggage?
A.
your age
B.
your flight number
C.
description about your luggage
D.
your contact number or address
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