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【单选题】
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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反馈参考答案：
举一反三
【简答题】n. 克制,控制,管制,操作装置 vt. 控制
【简答题】基层党委或县级党委组织部门应当对发展对象进行短期集中培训。培训时间一般不少于多长时间。
【简答题】根据短文内容判断下列句子的正(T)误(F)。 Cats Some cats are black. Some cats are white. Some cats are black and white. But no cats are green. This is a mother cat. She has five babies. She looks after (照顾) them. Baby c...
【简答题】阅读短文，判断正(T)误(F)。 Some cats are yellow. Some cats are black. Some cats are black and white. But no cats are green. I have a cat. It's a mother cat. She has five babies. She looks after them. We call ba...
【单选题】苯作业时，其毒性的靶器官是神经组织和造血系统，要预防和降低苯对机体的毒性。对苯作业人群在平衡膳食的基础上应补充维生素C（）
A.
50mg／d
B.
100mg／d
C.
150mg／d
D.
200mg／d
E.
1g／d
【简答题】平衡膳食的化学基础是什么？
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