对称三相负载三角形连接时,相电压UP与线电压UL、相电流IP与线电流IL的关系是______。 A: UL=31/2Up,IL=Ip B: IL=31/2Ip,UL=Up C: UL=Up,IL=Ip D: IL=31/2Ip,UL=31/2Up
对称三相负载三角形连接时,相电压UP与线电压UL、相电流IP与线电流IL的关系是______。 A: UL=31/2Up,IL=Ip B: IL=31/2Ip,UL=Up C: UL=Up,IL=Ip D: IL=31/2Ip,UL=31/2Up
三相交流电源作Y形连接时，线电压UL与相电压Up的数值关系为（）。 A: UL=Up B: UL=3Up C: UL=2Up D: UL=Up
三相交流电源作Y形连接时，线电压UL与相电压Up的数值关系为（）。 A: UL=Up B: UL=3Up C: UL=2Up D: UL=Up
电源作Y形连接时，线电压UL与相电压UP的数值关系为（） A: UL=√3UP B: UL=2UP C: UL=UP D: UL=3UP
电源作Y形连接时，线电压UL与相电压UP的数值关系为（） A: UL=√3UP B: UL=2UP C: UL=UP D: UL=3UP
命令：>;>;>;s='up,upandaway'>;>;>;s.count('up')的执行结果是： A: 1 B: 2 C: 1' D: 2'
命令：>;>;>;s='up,upandaway'>;>;>;s.count('up')的执行结果是： A: 1 B: 2 C: 1' D: 2'
2 pick up a TV ____ turn on a TV ____
2 pick up a TV ____ turn on a TV ____
2 Where did she grow out/up? ____
2 Where did she grow out/up? ____
Canada is made up of ______ provinces and ______ territories. A: 8, 2 B: 9, 2 C: 10, 2 D: 10, 3
Canada is made up of ______ provinces and ______ territories. A: 8, 2 B: 9, 2 C: 10, 2 D: 10, 3
(2)She is going to give up her job to be a full-time housewife.
(2)She is going to give up her job to be a full-time housewife.
For a n_input AND gate, the number of its inputs may be up to 2^n
For a n_input AND gate, the number of its inputs may be up to 2^n
(2). Having been held up, the store owner called the police.
(2). Having been held up, the store owner called the police.