填空题!
题目
填空题!
1、Jenny will help me ____ organize the school trip.
2、Look!Some ____teenager are planting trees.
3、It was easy work,so Joe decided to do it ____(he).
4、It's difficult for them ____(solve) their problem.
5、Can you give me some _____(adive) on how to do it?
答案
1 to
2 of
3 himself
4 to solve
5 advice 不可数名词‘ 建议’
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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