Everyone likes to buy things __ a good price.A.in B.on C.at
题目
Everyone likes to buy things __ a good price.A.in B.on C.at
Tom ,____students are there in your class?
----_____ .
A.how much;Thirty one
B.how many;Thirty one
C.how many;Thirty---one 单项选择
答案
1 A
2 C
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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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