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第1题

[单选题,1.3分] Fred is second to none in maths in our class, but believe it or not, he _______ passed the last exam. A.easi
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第2题

[单选题,1.3分] So far, several ships have been reported missing _______ the coast of Bermuda Island. A.off B.along C.on
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第3题

[单选题,1.3分] The lift in that tall building went wrong and got trapped _____ floors. People in it had no way to get out.
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第4题

.(多选题)分类抽样法又叫分层抽样法,具体做法是什么( ) (A) 决定分类所依据的标准 (B) 确定母体的总人数 (C) 计算每一类所占的人数比例 (D) 确立参考对象数量 (E) 采用简单随机抽样法
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