【多选题】一级负荷供电电源应符合( )的要求。
A.
应由两个电源供电,当一个电源发生故障时,另一个电源不致同时受到损坏
B.
在负荷较小或地区供电条件困难时,可由一回6kV及以上专用架空线路供电
C.
如--级负荷容量较大或有高压用电设备时应采用两路高压电源
D.
如一级负荷容量不大时,应优先从电力系统或临近单位取得第二低压电源
【单选题】在Visual Basic的立即窗口内输入以下语句 X=65 Print Chr$(X) 在窗口中显示的结果是
【简答题】The computer mouse derives its name from the cable that goes out its body, which looks like the tail of a mouse.
【简答题】一级负荷要求由 供电,二级负荷要求由 两回路线路供电,两回线路应引自 。
【单选题】患者,男,45岁,朋友探病送来了蛋白粉,护士告诫其家属,禁忌给患者食用,你分析这患者可能是
【简答题】What is the cause of the long waiting? [A] The computer of the place goes wrong. [B] There aren't enough people selling tickets. [C]The tickets are not many. [D] They haven't mentioned about it.
【多选题】在Visual Basic 中,具有Print 方法的对象有
【单选题】在Visual Basic中,Print“12”+45语句执行的结果是()