句型 1.They are on the chair 2.These are my frnends9(一般疑问句) 3.Those are my pencil
题目
句型 1.They are on the chair 2.These are my frnends9(一般疑问句) 3.Those are my pencil
答案
Are they on the chair .
Are these your frnends .
Are those your pencil
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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