用were,are,is was的正确形式填空
题目
用were,are,is was的正确形式填空
1.There many tunnels and highways in the city now.
2.There no highways or subways in the city before.
3.There no tunnels long,long ago.
4.There any fatories or piers 50 years ago.
5.There fast food when my grandpa was young.
6.our city quite different now?
7.there any computers 50 years ago?
8.these your photos?Yes,they are.
1.There many tunnels and highways in the city now.
2.There no highways or subways in the city before.
3.There no tunnels long,long ago.
4.There any fatories or piers 50 years ago.
5.There fast food when my grandpa was young.
6.our city quite different now?
7.there any computers 50 years ago?
8.these your photos?Yes,they are.
答案
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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