日调节水电站在日负荷图上的工作位置若向上移，其最大工作容量（）。 ["变小","变大","不变"]
儿童对形状形成正确直觉的关键期是（）岁。 ["1","2","3","4"]
In the 7-layer OSI model, which layer switching will take place?（） ["Layer one","Layer two","Layer three","Layer four"]
判别某种材料的切削加工性能是以бb=0.637Gpa（）的υ60为基准。 ["85钢","35钢","65钢","45钢"]
采用相同比例尺绘制水库容积曲线，水库库区窄深的较库区宽浅的曲线陡峭。
简述混凝土冬季施工可采取哪些措施？
