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【单选题】
影响声音的数字化质量的三个因素是采样率、位深度和（ ）。A.
周期
B.
分辨率
C.
声道数
D.
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反馈参考答案：
举一反三
【简答题】You ____that letter to James. However, you didn’t.
【单选题】I appreciate ______that letter for me.
A.
you to write
B.
your writing
C.
you write
D.
that you writing
【单选题】You that letter to James. However, you didn't.
A.
ought to write
B.
ought to have written
C.
should write
D.
should be writing
【单选题】听力原文：W: Did you read that letter in the newspaper about smoking? The person who wrote that must be crazy. M: I don't think so. I think the government should do everything it can to discourage people f...
A.
A man.
B.
A letter in the newspaper.
C.
A law.
D.
The government.
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