Features such as height,weight,and skin color__from individual to individual and from face to face
题目
Features such as height,weight,and skin color__from individual to individual and from face to face
A change B vary C alter D convert
答案
选B.vary vi.变化;变异;违反 vt.改变;使多样化;变奏
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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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