坝体排水系统检查的主要内容有,排水孔工作状况、排水量、水体颜色及浑浊度。
A. 对
B. 错
下游河床的冲淤情况不属于混凝土坝巡视检查的主要内容。
A. 对
B. 错
Chinese rules of etiquette regarding costumes and adornments started taking shape in the______ dynasty, regulating from nobles down to commoners
A. Xia
B. Zhou
_____ had been used in the front of costumes for several thousand years before the Ming dynasty.
A. buttons
Band knots