over 40 percent of children were just as likely to choose active as inactive pastimes.
题目
over 40 percent of children were just as likely to choose active as inactive pastimes.
答案
多于百分之40的孩子对于主动和被动的课余时间选择是相同的
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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