He thinks it is difficult to work out the problem(变为同义句)
题目
He thinks it is difficult to work out the problem(变为同义句)
He thinks it__ __ __ work out the problem 将空填起来
答案
1.He thinks it is hard to work out the problem.
2.He thinks it isn't easy to work out the problem.
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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