julia,linda and rose are both my pen pals 改错
题目
julia,linda and rose are both my pen pals 改错
it spends me so much time to do homework改错
can you tell me what it mean改错
答案
both适用于二者,all用于3者或3者以上,所以both改成all
spend的主语是人,将spend改为take
mean改为means(what it means为宾语从句,用陈述句,2楼是错的)
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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