(1/3)改错:Last week,my father and mother have a quarrel about whether we s
题目
(1/3)改错:Last week,my father and mother have a quarrel about whether we s
(1/2)改错:On the contrary,my mother were against it,because she held the v(2/2)iew cars not only wasted money and energy,but also polluted the air
答案
正确的是Last week,my father and mother had a quarrel about whether we.
last week表过去,谓语动词也需用过去时态,所以have改为had
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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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