31. Since his retirement, having a walk along the river after supper has become part of his daily ______. A. tradition B. custom C. convention D. routine这题我跟答案有不同见... 展开
31. Since his retirement, having a walk along the river after supper has become part of his daily ______. A. tradition B. custom C. convention D. routine这题我跟答案有不同见解 5飞船从地球飞到月亮与从月亮飞到地球，耗费燃料相同吗？哪个多？ 这题征集一下答案 收起
