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问题
判断题
车钩的钩舌在关锁状态时最大为250．mm。
答案
参考答案：错
选择题
As the years passed, many occasions-birthdays, awards, graduations-_____ with Dad's flowers.
A. are marked
B. were marked
C. have marked
D. had marked
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名词解释
音位
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