把下列语句改成被动语态.
题目
把下列语句改成被动语态.
1 The man painted the wall blue.
2 Someone met us at the airport.
3 We sweep the floor every day.
4 Mr Black invited us to dinner this night.
5 The boy broke the vase.
答案
1.The wall was painted blue.2.We were met by someone at the airport.3.The floor was swept by us everyday.4.We were invited by Mr Black to dinner this night.5.The vase was broken by the boy.
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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