People working in the office should have more e____ every day.
题目
People working in the office should have more e____ every day.
答案
应该是exercise!楼上都错了!exercise的意思是“练习”时是可数的.例如：Let's do some exercises.做操之类的也是可数的.例如：Let's do morning exercises.意思是“锻炼,训练”的时候,它是不可数的.例如：enough exe...
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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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