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【单选题】
光电信息检测系统是指将待测光学量或非光学待测物理量转换成(),通过光电变换电路和计算处理的方法进行检测的系统。A.
光学量
B.
化学量
C.
热学量
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【单选题】听力原文： One of New York's most beautiful and valuable buildings is in danger---the New York Public Library, in the heart of the city at 42nd Street and 5th Avenue, may have to close its doors. The libra...
A.
It's very far from the heart of the city.
B.
Its doors face the 42nd Street and 5th Avenue.
C.
It's at the 42nd Street and 15th Avenue crossing.
D.
It's at the crossroads of 42nd Street and 5th Avenue.
【单选题】Which one of the following American cities is the birthplace of jazz?
A.
New Orleans.
B.
New York.
C.
Boston.
D.
Chicago.
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