用until造句.10句
题目
用until造句.10句
答案
The plane climbed until it was clear of the clouds.飞机爬升穿出了云层.Stay in concealment until the danger has passed.藏着别动,等危险过后再出来.The hunt for the lost child continued until she was foun...
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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