this fridge needs( )I think I need( )Uncle Zhnag for help to mend/mending to ask/asking怎么回答
题目
this fridge needs( )I think I need( )Uncle Zhnag for help to mend/mending to ask/asking怎么回答
答案
this fridge needs( mending)I think I need (to ask )Uncle Zhnag for help .
need 后跟动名词表被动,主语是物,桥需要修理.need 后跟不定式时,主语一般是人.
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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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