is surrounded by beautiful woods.
题目
is surrounded by beautiful woods.
I live in a very old town which is surrounded by beautifulwoods.
为什么which 后面是is
答案
I live in a very old town which is surrounded by beautifulwoods.
我住在一个被美丽树木环绕的非常老的镇子里.
主句I live in a very old town
which is surrounded by beautifulwoods.是定语从句,修饰town
定语从句which is surrounded by beautifulwoods.采用了被动结构,因为是树木环绕镇子,而镇子只能被环绕,所以采用了be+done的一般被动语态,就是本句的is surrounded
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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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