...with the (introduce) of electric-powered engines and lifts.
百度试题 结果1 题目(This development was only possible with the (introduce) of electric-powered engines and lifts.相关知识点: 试题来源: 解析 答案introduction由空前的定冠词可知,此处需用名词形式,动词introduce去“e”加后缀-tion构成 名词形式。反馈 收藏 ...