The boy dropped his stick, ________ he _________ it and fell behind.
题目
The boy dropped his stick, ________ he _________ it and fell behind.
A. and … stopped;getting
B. so … stopped;getting
C. / … stopped ;to get
D. so … stopped; to get
答案
d
stop to do与stop doing的区别别,to do 停止现在的事情去干另外一件事情,doing表示停止现在手头的事情.
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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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