资料上提供的常见物质的转化关系有一些不理解的反应

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• —why?Tom,your shirt is so dirty!—Mum,I ___my storeroom downs

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• In the game,you should stand in front of the class ang keep

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• △ABC.角B=90度,∠B＝90°,AB=6㎝,BC=8㎝,点P从A开始沿AB向点B以1/s的速度

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• — Would you come to our party tomorrow, Della?

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• 在三角形ABC中,sinA=5分之3,cosB=13分之5,求tanC的值

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精彩回答

• The chief manager has decided to put _____ he thinks is energetic, clever and capable to the position of the leadership of the company.

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• She looks sad. Could you please tell me that prevents her from being as happy as before? [ ]

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• My baby is ill. Please give some _____ . [ ]

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• 5吨=________千克 4千米=________米 3000克=________千克 7000米=________千米

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• 已知（a+b）²=8,（a-b）²=3,求a的4次方+b的4次方的值.用完全平方公式解答

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