新概念一册137-144课练习题
题目
新概念一册137-144课练习题
答案
137 A pleasant dream用反义词来纠正短文中[ ]内的错误用词John was a very [rich](poor)man.He always had dreams of [losing](winning) the football pools.He told me that if he [lost](won)the football pool...
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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