_____ there out of every four high school students in our city now have mobile phones of their own
题目
_____ there out of every four high school students in our city now have mobile phones of their own
横线上可以填什么 A Sooner or later B here and there C now and then D believe it or not
答案
D,信不信由你的意思.这句话讲的是现在在我们城市有超过四所中学的学生有他们自己的手机.
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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.
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