能够完全匹配字符串“kick”和“kick-off”的正则表达式包括: A: w{4}-w{3}|w{4} B: w{4}|w{4}-w{3} C: S+-S+|S+ D: w*?-?w*|w*
能够完全匹配字符串“kick”和“kick-off”的正则表达式包括: A: w{4}-w{3}|w{4} B: w{4}|w{4}-w{3} C: S+-S+|S+ D: w*?-?w*|w*
下列各组量子数中,合理的一组是( ) A: n = 4, l = 2, ml = +3, ms = −1/2 B: n = 4, l = 5, ml = −1, ms = +1/2 C: n = 3, l = 1, ml = +1, ms = +1/2 D: n = 3, l = 3, ml = +1, ms = −1/2
下列各组量子数中,合理的一组是( ) A: n = 4, l = 2, ml = +3, ms = −1/2 B: n = 4, l = 5, ml = −1, ms = +1/2 C: n = 3, l = 1, ml = +1, ms = +1/2 D: n = 3, l = 3, ml = +1, ms = −1/2
下列各组量子数合理的一组是()。 A: n=4,L=5,mL=-1,mS=+1/2 B: n=3,L=1,mL=+1,mS=+1/2 C: n=3,L=3,mL=+1,mS=-l/2 D: n=4,L=2,mL=+3,mS=-1/2
下列各组量子数合理的一组是()。 A: n=4,L=5,mL=-1,mS=+1/2 B: n=3,L=1,mL=+1,mS=+1/2 C: n=3,L=3,mL=+1,mS=-l/2 D: n=4,L=2,mL=+3,mS=-1/2
下列各组量子数中,合理的一组是( ) A: n = 3, l = 1, m = -1, ms = +1/2 B: n = 4, l = 5, m = -1, ms = +1/2 C: n = 3, l = 3, m = +1, ms = -1/2 D: n = 4, l = 2, m = +3, ms = -1/2
下列各组量子数中,合理的一组是( ) A: n = 3, l = 1, m = -1, ms = +1/2 B: n = 4, l = 5, m = -1, ms = +1/2 C: n = 3, l = 3, m = +1, ms = -1/2 D: n = 4, l = 2, m = +3, ms = -1/2
下列各组量子数中合理的是 A: n=3,l=3,m=-3,ms=+1/2 B: n=3,l=2,m=-2,ms=–1/2 C: n= 4,l=-1,m=0,ms=+1/2 D: n= 4,l=1,m=-2,ms=–1/2
下列各组量子数中合理的是 A: n=3,l=3,m=-3,ms=+1/2 B: n=3,l=2,m=-2,ms=–1/2 C: n= 4,l=-1,m=0,ms=+1/2 D: n= 4,l=1,m=-2,ms=–1/2
下列各组量子数中,合理的一组是( ) A: n = 3, l = 1, ml = -1, ms= +1/2 B: n = 4, l = 0, ml = -1, ms= +1/2 C: n = 3, l = 3, ml = +1, ms= -1/2 D: n = 4, l = 2, ml = +3, ms= -1/2
下列各组量子数中,合理的一组是( ) A: n = 3, l = 1, ml = -1, ms= +1/2 B: n = 4, l = 0, ml = -1, ms= +1/2 C: n = 3, l = 3, ml = +1, ms= -1/2 D: n = 4, l = 2, ml = +3, ms= -1/2
写出下列各种情况的合理量子数。 (1)n = ,l = 2, m = 0, ms = +1/2 (2)n = 3,l = ,m = 1,ms = -1/2 (3)n = 4,l = 3,m = 0,ms = (4)n = 2,l = 0,m = ,ms = +1/2 (5)n = 1,l = ,m = 0 ,ms =
写出下列各种情况的合理量子数。 (1)n = ,l = 2, m = 0, ms = +1/2 (2)n = 3,l = ,m = 1,ms = -1/2 (3)n = 4,l = 3,m = 0,ms = (4)n = 2,l = 0,m = ,ms = +1/2 (5)n = 1,l = ,m = 0 ,ms =
下列各组量子数中,合理的一组是( )。 A: n=3,l=4,m=+1,ms=+½ B: n=3,l=1,m=+1,ms=+½ C: n=3,l=0,m=+1,ms=+½ D: n=3,l=3,m=+1,ms=+½
下列各组量子数中,合理的一组是( )。 A: n=3,l=4,m=+1,ms=+½ B: n=3,l=1,m=+1,ms=+½ C: n=3,l=0,m=+1,ms=+½ D: n=3,l=3,m=+1,ms=+½
如图所示电路,则电压源发出的功率等于:( ____)[img=167x103]18033abb0262553.jpg[/img] A: 1 W B: -4/3 W C: 4/3 W D: 1/3 W
如图所示电路,则电压源发出的功率等于:( ____)[img=167x103]18033abb0262553.jpg[/img] A: 1 W B: -4/3 W C: 4/3 W D: 1/3 W
假设原始问题为: max z=2x 1 -x 2 +3x 3 -2x 4 s.t. x 1 +3x 2 - 2x 3 + x 4 ≤12 -2x 1 + x 2 -3x 4 ≥8 3x 1 - 4x 2 +5x 3 - x 4 = 15 x 1 ≥0, x 2 :Free, x 3 ≤0, x 4 ≥0 则对偶问题中约束条件及决策变量的符号依次为: min y=12w 1 +8w 2 +15w 3 s.t. w 1 - 2w 2 + 3w 3 ( ) 2 3w 1 + w 2 - 4w 3 ( ) -1 -2w 1 +5w 3 ≤3 w 1 - 3w 2 - w 3 ≥-2 w 1 () 0,w 2 () 0, w 3 :Free
假设原始问题为: max z=2x 1 -x 2 +3x 3 -2x 4 s.t. x 1 +3x 2 - 2x 3 + x 4 ≤12 -2x 1 + x 2 -3x 4 ≥8 3x 1 - 4x 2 +5x 3 - x 4 = 15 x 1 ≥0, x 2 :Free, x 3 ≤0, x 4 ≥0 则对偶问题中约束条件及决策变量的符号依次为: min y=12w 1 +8w 2 +15w 3 s.t. w 1 - 2w 2 + 3w 3 ( ) 2 3w 1 + w 2 - 4w 3 ( ) -1 -2w 1 +5w 3 ≤3 w 1 - 3w 2 - w 3 ≥-2 w 1 () 0,w 2 () 0, w 3 :Free