防火门按耐火极限分为下列几类()。 A.甲、乙、丙 B.I级、II级、III级 C. 发布时间:2018-09-12 22:08 │ 来源:www.tikuol.com 题型:单项选择题 问题: 防火门按耐火极限分为下列几类()。A.甲、乙、丙B.I级、II级、III级C.A类、B类、C类
题型:单项选择题 Please post this letter in the post office nearby, and __________, I will get two tickets in the train station. A.in meantimeB.on the meanwhileC.in meanwhileD.in the meantime 查看答案