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【简答题】CET 4 Listening ( Model Test Two) Section A Questions 1 and 2will be based on the following news item. 1.A) The research into the sources of clean energy B)Nuclear power factories that create huge ene...
【单选题】下列表达式中,不满足“当x的值为偶数时值为真,为奇数时值为假”的要求的表达式是
【单选题】If the machines are not to be installed after delivery, they must be stored ________________ .