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王老师:19139051760(拨打)
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第1题

Americans love their cars. When gas was _1_, Americans drove everywhere, even to buy something at a store two or three b
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第2题

Americans believe so much in moving ahead that they are _1_ researching, experimenting and exploring. They treat time as
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第3题

尘粒的自由沉降速度与（）的成反比
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第4题

The traditional American Thanksgiving Day celebration goes back to 1621. In that year a special feast was prepared in Pl
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