英语下学期必修3unit4的课文how life began on the earth的主语从句有哪些
题目
英语下学期必修3unit4的课文how life began on the earth的主语从句有哪些
答案
What it was to become was uncertain until between 4.5 and 3.8 billion years age when rhw dust settled into a solid globe The earth became so violent that it was not clear whenever the shape would last...
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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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