一.写出下列动词的三单形式和现在分词. 1.do 2.study 3.have 4.swim 5.dive 6.jump 7.run 8.dance
题目
一.写出下列动词的三单形式和现在分词. 1.do 2.study 3.have 4.swim 5.dive 6.jump 7.run 8.dance
9.teach
答案
does doing studies studying has having swims swiming dives diving jumps jumping
runs running dances dancing teaches teaching
举一反三
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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