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问题
填空题
钢带铠装聚乙烯护套电缆的外护层型号是（）。
答案
参考答案：23
选择题
Have you ever ______ the Great Wall?
A. heard of
B. hear of
C. hear from
D. heard from
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选择题
Wang Fang is famous
her sweet voice. [ ]
A. with
B. as
C. for
D. on
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