We should help each other in difficult times.改为同义句
题目
We should help each other in difficult times.改为同义句
We should help each other ( )( )( )( )
What were you doing when it rained?
What were you doing ( )( )( )( )the rain?
答案
1.during the hard times
2.at the time of
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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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