45.American companies are evolving from mass-production manufacturing to ________ enterprises. A. moveable B. changing C. flexible D. varying 正确答案:C满分:2分 46.A power failure created ____ in transportation. A. emergency B. enclosure C. extension D. excitement 正确答案:A满分:2分 47.The wheels stuck in the ____. A. mud B. clay C. soil D. earth 正确答案:A满分:2分 48.Most laboratory and field studies of human behavior ______taking a situational photograph at a given time and in a given place. A. attach B. compose C. involve D. enclose 正确答案:C满分:2分 (责任编辑:admin)要这答案加QQ:800020900 或加微信:q800020900 获取 |