Both the kids and their parents __________English,

Both the kids and their parents __________English, I think. I know it from their

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The charity originally means to ____.选择一项:A. help

The charity originally means to ____.选择一项:A. help clients return to normal lifeB

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已知一对外啮合渐开线直齿圆柱标准齿轮传动,z1=20,z2=40,m=10mm, a=20°,ha*

已知一对外啮合渐开线直齿圆柱标准齿轮传动,z1=20,z2=40,m=10mm, a=20°,ha*=1,c*=0.25,试求:齿轮1的分度圆半径r1;基圆半径

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Zhang Hua himself _________ bear some (/any) respo

Zhang Hua himself _________ bear some (/any) responsibility.选择一项:A. mustn.tB. sh

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且夫我尝闻少仲尼之闻而轻伯夷之义者 闻:

且夫我尝闻少仲尼之闻而轻伯夷之义者 闻:

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