单选:有封闭内院或天井的建筑物沿街时,应设置连通街道和内院的人行通道(可利用楼梯间),其间距不宜大于()。 题目分类:二级消防工程师 题目类型:单选 查看权限:VIP 题目内容: 有封闭内院或天井的建筑物沿街时,应设置连通街道和内院的人行通道(可利用楼梯间),其间距不宜大于()。A.60mB.70mC.80mD.90m 参考答案: 答案解析:
In the last few years,there________great changes in the country. In the last few years,there________great changes in the country. A.had beenB.wereC.have beenD.has been 分类:二级消防工程师 题型:单选 查看答案