题目

I don't have a black pen, ________ Gary _______. A . and; does B . and; doesn't C . but; does D . but; doesn't 答案：C（8分）某货主租用汽车运输公司的甲、乙两种货车运货，两次租用的车辆数和运货数如下表所示，问甲、乙两种货车每次能运货多少吨？第一次第二次甲种货车车辆数（辆）52乙种货车车辆数（辆）36累计运货数（吨）37.539