高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating 7) ____in this

8题,求详细解题步骤,谢谢! 求这个不等式的详细解题步骤,谢谢 求下面定积分的详细解题步骤,谢谢! 微积分解题求解求解!谢谢!求详细步骤 求一道不定积分的详细解题步骤!急!∫cos4xdx=?要详细的解题步骤.我是一个初学者.谢谢 高中化学题目,求求详细解题步骤谢谢! 求这题的图,详细解题步骤谢谢! 求详细步骤,谢谢! 高中英语题目,务必求详细解题步骤谢谢!7. So carelessly_____that he almost kill himself. A.he drives B.he drove C.does he drive D.did he drive 8. Early in the morning_____the news_____the enemy had been defeated 用一元一次方程解答,求详细解题步骤 高中物理求详细的解题步骤 如图第9题,求详细解题步骤 大一高数,求详细解题步骤（每一步）,谢谢 高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating 7) ____in this 怎样利用机械能守恒定律解题?需要详细的步骤,谢谢 如图所示高中数学作业 要详细解题步骤谢谢! 求解题求高一物理解题!详细过程,谢谢谢谢谢谢谢谢谢谢谢谢谢谢 设f(x)的定义域是[0,1],求f(lnx)的定义域请写出详细解题步骤,谢谢