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【多选题】
下列关于恒参信道对信号的影响包括_________。A.
幅度-频率失真
B.
相位-频率失真
C.
频率偏移
D.
相位抖动
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【简答题】Within EU primary education, a clear majority of pupils choose to study English like a foreign language. Indeed, learning English is mandatory in several【M1】______ countries within secondary education...
【简答题】Over 60﹪of pupils in South African schools choose English for learning and teaching, but only 7﹪of pupils speak English as their home language, a recent South Africa survey shows. Out of the country’s...
【单选题】_______ interesting it is to talk with some American pupils in English!
A.
How
B.
How an
C.
What
D.
What an
【简答题】Look, the pupils ________ (have) an English class.
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