My sister is a good typewrite.--You()say:"My sister is a good typist." 括号选项 A can B ought to
题目
My sister is a good typewrite.--You()say:"My sister is a good typist." 括号选项 A can B ought to
还有两个选项 C must D may 应该选哪个
答案
B ought to
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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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