双绕组降压变压器,一、二次侧额定值的关系是( )
A: S1N=S2N,U1N>U2N,I1N>I2N ;
B: S1N=S2N,U1N>U2N,I1N
C: S1N>S2N,U1N>U2N,I1N>I2N ;
D: S1N>S2N,U1N>U2N,I1N
A: S1N=S2N,U1N>U2N,I1N>I2N ;
B: S1N=S2N,U1N>U2N,I1N
C: S1N>S2N,U1N>U2N,I1N>I2N ;
D: S1N>S2N,U1N>U2N,I1N
举一反三
- 双绕组降压变压器,一、二次侧额定值的关系是() A: S1N=S2N，U1N＞U2N，I1N＞I2N B: S1N=S2N，U1N＞U2N，I1N＜I2N C: S1N＞S2N，U1N＞U2N，I1N＞I2N D: S1N＞S2N，U1N＞U2N，I1N＜I2N
- 双绕组降压变压器,一、二次侧额定值的关系是( ) A: S1N=S2N,U1N>U2N,I1N>I2N ; B: S1N=S2N,U1N>U2N,I1N C: S1N>S2N,U1N>U2N,I1N>I2N ; D: S1N>S2N,U1N>U2N,I1N
- 假设整型n已输入值。以下不能正确计算1*2*3*...*n的程序段是_______。 (1) for(i=1,s=1; i<=n; i++) s*=i; (2) i=1;s=1; while(i<=n) s*=i++; (3) i=0,s=1; do{ i++,s*=i; }while(i<=n); (4) for(i=1,s=1; ; i++) { s = s*i, if(i==n) break; }
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