【简答题】A.He doesn't understand his staff. B.His computer doesn't work properly. C.He doesn't know how to apply computer theory. D.He is trouble to add the figures.
【多选题】霍金的科学贡献包括( )。
D.
试图把广义相对论和量子理论合并成完备的统一理论
【多选题】关于电源调节,下列表述正确的是
A.
开机后电压从零开始上调,电压下调为零后再关机
B.
开机后先看液晶屏显示和指示灯,根据指示灯调整相应旋钮
C.
开机前调节旋钮先调为零,电压下调为零后再关机
【单选题】关于电力系统事故备用容量的分配,下列表述中( )不正确。
B.
调节性能好和靠近负荷中心的水电站(尤其是蓄水式水电站)可担负较大事故备用容量
D.
承担事故备用容量的各类电源,均应具有相应的能量或燃料储备
【简答题】A.He doesn't understand his staff. B.His computer doesn't work properly. C.He doesn't know how to apply computer theory. D.He is unable to add the figures.
【单选题】下列关于节能与可再生能源表述不正确的是()。
D.
利用燃气轮机进行天然气发电不属于可再生能源利用