求详解At first she found___ what she wanted to.A.that it hard to do B.hard to do C.it hard to do
题目
求详解At first she found___ what she wanted to.A.that it hard to do B.hard to do C.it hard to do
答案
答案为C1）考点：it作形式宾语,指代to do sth这个真正的宾语,sth为do宾语这里的sth被what she wanted to这个从句代词,同样作do的宾语.2）表达效果：为了避免句子头重脚轻的现象.3）At first she found it hard to do...
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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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