题目内容

Who is regarded as the first advance in popular music since the war?

A. Ludwig Beethoven
B. Wolfgang Amadeus Mozart
C. Bob Dylan
D. Beatles

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Which song doesn't belong to the Beatles?

A. Without you
B. Let it be
C. Hey Judy
D. Five hundred miles

Translate the following sentences.Don't ask what your country can do for you, but ask what you can do for your country！

1. He told me he would _ (再也不) go shopping with me.2. His father (过去常常) smoke, but now he doesn’t.

设一离散无记忆信源的输出由四种不同的符号组成，它们出现的概率分别为1/2、1/4、1/8、1/8，若信源每毫秒发出一个符号，那么此信源平均每秒输出的信息量为（）bit。