He used sand to put out the fire.=He _ _ the fire _ _.
题目
He used sand to put out the fire.=He _ _ the fire _ _.
Zhang Ming was glad that he helped Mrs Wang=Zhang Ming was glad _ _ Mrs Wang
The smoke in the room is very heavy.=There is _ _ _ _ in the room.
He ate something after he saw the doctor.=He_ _ _ _ he saw the doctor.
答案
put out,with sand
to help
a very heavy smoke
didn't eat anything until
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.
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