many houses and buildings were ________(destroy) inthe earthquake
题目
many houses and buildings were ________(destroy) inthe earthquake
应该填什么啊.
答案
destroyed
were + 过去分词：构成一般过去时的被动语态
许多房屋和建筑都在地震中被毁坏掉了.
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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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