电站厂房位于拦河坝的下游,紧接坝后,在结构上与大坝用永久缝分开,发电用水由坝内高压管道引入厂房。这种水电站的开发方式称为()。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧