I saw an old man f_______off his bike just now.
题目
I saw an old man f_______off his bike just now.
答案
fall (see sb do 意为看到某人做过某事,1楼 see sb doing 意为看见某人正在做某事.因为just now 个人认为fall更好.二楼纯粹开黄枪,结构上不属于英语.
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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