题型：名词解释 _____ nearly 400 miles before nightfall, all of us felt exhausted(筋疲力尽). [ ]A. CoveringB. CoveredC. Having coveredD. To be covered 查看答案
题型：名词解释 已知函数f（x）=lnx，g(x)=ax，设F（x）=f（x）+g（x）．（Ⅰ）当a=1时，求函数F（x）的单调区间；（Ⅱ）若以函数y=F（x）（0＜x≤3）图象上任意一点P（x0，y0）为切点的切线斜率k≤12恒成立，求实数a的最小值． 查看答案
