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- 2You had better talk to older people much ( )(polite)
- 3把一个高8分米的圆柱体木块,高减少2厘米,表面积就减少12.56平方厘米,原来圆柱的表面积是多少?
- 4Mr Green__for America the day after tomorrow.A.left B.leavesC.is leaveingD.is going to leave(C)
- 5I paid so much money as there to be no much left.
- 6一个光盘,内圆半径是2cm,外圆半径是3cm,圆环面积是_.
- 7零下6·c比零下9·c的温度?
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- 10相同质量的两份铝分别放入足量盐酸和氢氧化钠溶液中,产生氢气在相同状态下的体积之比为多少?