法兰在容器与管道中起()作用。A、连接 B、密封 C、连接与密封 D、配合 发布时间:2017-08-04 18:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 法兰在容器与管道中起()作用。A、连接B、密封C、连接与密封D、配合
题型:单项选择题 —I won't go to Ann's birthday party this coming Saturday.—__________ you told me you would. What's happening? [ ]A. But B. So C. And 查看答案