用“sound"造句【5个】急!
题目
用“sound"造句【5个】急!
答案
He heard a sound . he stood by the door listening .
A speech sound accompanied by sound from the vocal cords.
The sound of this instrument or a sound resembling it.
Where there is a sound,there is sound wave.
A sound mind is inseparable from a sound body.
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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