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- 1What did she do yesterday?这个句子成立吗
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- 3写一篇英语40词以上的短文描述一下你的房间
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- 7解方程:(x/x+1)平方-x/5+5x+4=0
- 8儿童一天各类食物摄入量
- 9静止在水平桌面上的墨水瓶受到--力和--力的作用,他的施力物体分别是-----和------
- 10已知函数f(x)=lna+lnx/x在[1,+∞)上为减函数,则a的取值范围为_.