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问题
填空题
弟弟今年8岁,哥哥今年14岁,当二人年龄之和是50岁时,弟弟( )岁,哥哥( )岁。
答案
22;28
选择题
The United States
up its satellite until January 31,1958.
A. sent
B. didn't send
C. hasn't sent
D. wasn't sent
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问答题 简答题
车辆调度员工作程序是什么?
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