【单选题】进行初步计算配合比设计时,用来确定砂、石用量的体积法假定主要是指()
A.
假定混凝土拌合物的体积等于各组成材料的体积与拌合物中所含空气的体积之和
B.
假定混凝土拌合物的体积等于各组成材料的体积与拌合物中所含水的体积之和
C.
假定混凝土拌合物的体积等于各组成材料的体积与拌合物中所含空气的体积之差
D.
假定混凝土拌合物的体积等于各组成材料的体积与拌合物中所含水的体积之差
【单选题】劳动适龄人口指( )。
C.
男16~60 周岁、女 16~55 周岁的全部人口
D.
男16~60 周岁、女 16~55 周岁的具有劳动能力的人口
【单选题】混凝土配合比设计的第一步是()
A.
根据混凝土拌合物的坍落度指标,初步估计单位用水量
【简答题】完形填空。 Jim is the son of a farm owner. One New Year's Day, when he was 15 years old, his father 1 him to work on the farm for one year at his free time. Jim was 2 with his father's idea. 'That isn't my...
【简答题】完形填空 The Spring Festival(春节) is the Chinese New Year's Day. It usually comes 1 February. Everyone in China 2 the Spring Festival very much. When the Spring Festival 3 , Li Hong usually 4 his parents c...
【单选题】下列以丝氨酸/苏氨酸激酶受体介导信号转导的物质是
【判断题】地图数据中的空间数据是用来描述地面物体或现象的空间位置、形状、大小和分布特征诸方面的信息。
【判断题】地图数据中的空间数据是用来描述地面物体或现象的空间位置、形状、大小和分布特征诸方面的信息。
【简答题】根据所给首字母填空。 The Spring Festival is the Chinese New Year's D 1 . It usually comes in F 2 . Everyone in China l 3 the Spring Festival. When the Spring Festival comes, Li Lei usually h 4 his parents clean...