【判断题】混混凝土浇筑时,在竖向结构中限制自由倾落高度不宜超过2m( )。
【判断题】为防止混凝土浇筑时离析,混凝土自高处倾落的自由高度不应超过2.5m,在竖向结构中限制自由倾落高度不宜超过3.0m。
【判断题】为防止混凝土浇筑时离析,混凝土自高处倾落的自由高度不应超过2.5m,在竖向结构中限制自由倾落高度不宜超过3.0m。
【单选题】浇筑混凝土时为防止混凝土发生离析现象,混凝土在竖向结构中限制自由倾落高度不宜超过( )
【简答题】阅读理解。 Barack Obama, a black man,is the president of the United States now. He was born on August 4th, 1961, in Haiwaii (夏威夷) and has lived in many places. His mother was from Kansas (堪萨斯州) and his fat...
【单选题】修饰度“很好”级别的钻石,允许 10 倍放大镜下见及
【简答题】Barak Obama(巴拉克.奥巴马), a black man, is the president(总统) of the United States now. He was born on August 4 th , 1961, in Hawaii(夏威夷) and has lived in many places. His mother was from Kansas(堪萨斯州) and h...
【简答题】请阅读下面有关希望工程帮助失学儿童的报道,根据所提供的信息,完成信息卡。 Almost every child in cities has the chance to go to school,but not all children in the countryside are so luckly. There is a girl called Xiao Juan.She is ten year...
【单选题】浇筑混凝土时为防止混凝土发生离析现象,混凝土在竖向结构中限制自由倾落高度不宜超过( )