热水采暖集中调节是指对锅炉内工质的()和主送水的流量进行调节,也就是改变锅炉的容量。
查看答案
At night,a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two().
A. red lights
B. red lights and two white lights
C. red lights with a white light in between
D. white lights with a red light in betwee
大型货车载物长度不准超出车身。
A. 正确
B. 错误
()是学校体育目标的具体执行者和组织者,且其工作好坏关系到学校体育目标能否全面完成。
A. 体育教师
B. 政府
C. 校长
D. 教师