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题目内容
（请给出正确答案）
A.518 kHz using FEC mode
B.4, 209. 5 kHz using FEC mode
C.486 kHz using FEC mode in China
D.486 kHz using FEC mode
答案
A、518 kHz using FEC mode
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第1题
Directions: For this part， you are allowed 30 minutes to write a short essay
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第2题
A. which they ask for
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C. for which they ask for
D. which they ask
第3题
A.for which
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第4题
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第5题
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A.that
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D.in which
第6题
A.for; to
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第8题
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A.that
B.which
C.what
D.that which
第9题
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A.in which
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