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- 1please turn the second turning on the left.take tne second turning on the right.
- 2如图,在正方体ABCD-A1B1C1D1中,求证:平面ACC1A1⊥平面A1BD.
- 3很高兴收到你的来信 英文怎么说
- 4用高数函数极限的定义证明:f(x)=1/(x-1) x趋近于2的极限为2
- 5例;我爱看繁星. 我爱看天上密密麻麻的繁星. 我的 眼睛模糊了.----------------------------------
- 62x的3次方-7x的2次方+2x的2次方-3x+1与2x的3次方-4x的2次方-x的2次方-3x+1
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- 8以月亮作意向的诗词,名句
- 9I like h___ sports too.After school I often p____basketball with my friends.
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