Taking regular exercise is a good habit ,___ my grandfather formed in his childhood.
题目
Taking regular exercise is a good habit ,___ my grandfather formed in his childhood.
这个题为什么要填one 而不是what?
答案
Taking regular exercise is a good habit ,one (that) my grandfather formed in his childhood.
逗号后面的是不定代词短语用作habit的同位语,而省略掉的that引导了一个定语从句修饰one这个先行词.
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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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