They spent a lot of time ___ (go ) back.They had bikes and they ___(feel)convenient.
题目
They spent a lot of time ___ (go ) back.They had bikes and they ___(feel)convenient.
答案
spent time (in)doing sth
根据此句型,填going(括号内是可以省略的)
后一空根据had可以判断是一般过去时,填felt
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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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