气体取样应注意什么?
靠近上游坝面水下部分的测点,混凝土温度过程线升温段较(),降温段较() ["高","陡峻","平缓","低"]
能效标准的内容总体上包括:() ["A.能效(能耗)限定值","B.节能评价值","C.能源效率等级","D.超前能效指标"]
同一坝段的混凝土重力坝水平位移的最大变幅应该出现在() ["坝顶","1/2坝高","1/3坝高","坝底"]
能效标准是规定产品能源性能的程序或法规。依据规定的内容划分,能效标准分为:() ["A.指令性标准","B.平均能耗标准","C.平均能耗标准","D.能效分级标准"]
外注式单体液压支柱是由哪些零部件组成的?