下面程序的输出结果是( )。L=[('b', 3), ('c', 1), ('d', 2), ('a', 5)]L.sort()print(L) A: {('a', 5), ('b', 3), ('c', 1), ('d', 2)} B: [('a', 5), ('b', 3), ('c', 1), ('d', 2)] C: [('c', 1), ('d', 2), ('b', 3), ('a', 5)] D: [('b', 3), ('c', 1), ('d', 2), ('a', 5)]
下面程序的输出结果是( )。L=[('b', 3), ('c', 1), ('d', 2), ('a', 5)]L.sort()print(L) A: {('a', 5), ('b', 3), ('c', 1), ('d', 2)} B: [('a', 5), ('b', 3), ('c', 1), ('d', 2)] C: [('c', 1), ('d', 2), ('b', 3), ('a', 5)] D: [('b', 3), ('c', 1), ('d', 2), ('a', 5)]
有六组量子数: (1) n=3,l=1,m=-1;(2) n=3,l=0,m=0;(3) n=2,l=2,m=-1;(4) n=2,l=1,m=0;(5) n=2,l=0,m=-1;(6) n=2,l=3,m=2 其中正确的是( )。 A: (1)(3)(5) B: (2)(4)(6) C: (1)(2)(4) D: (1)(2)(3)
有六组量子数: (1) n=3,l=1,m=-1;(2) n=3,l=0,m=0;(3) n=2,l=2,m=-1;(4) n=2,l=1,m=0;(5) n=2,l=0,m=-1;(6) n=2,l=3,m=2 其中正确的是( )。 A: (1)(3)(5) B: (2)(4)(6) C: (1)(2)(4) D: (1)(2)(3)
在下列六组量子数中,正确的是① n=3,l= 1,m=-1 ② n = 3,l= 0,m = 0③ n = 2,l= 2 ,m=-1 ④ n = 2, l = 1 ,m = 0 ⑤ n = 2,l = 0,m =-1 ⑥ n= 2,l = 3 , m= 2 A: (1),(2),(4) B: (2),(4),(6) C: (1),(2),(3) D: (1),(3),(5)
在下列六组量子数中,正确的是① n=3,l= 1,m=-1 ② n = 3,l= 0,m = 0③ n = 2,l= 2 ,m=-1 ④ n = 2, l = 1 ,m = 0 ⑤ n = 2,l = 0,m =-1 ⑥ n= 2,l = 3 , m= 2 A: (1),(2),(4) B: (2),(4),(6) C: (1),(2),(3) D: (1),(3),(5)
下列各组量子数哪些是不合理的,为什么? (1) n=2,l=1,m=0; (2) n=2,l=2,m=-1; (3) n=3,l=0,m=0; (4) n=3,l=1,m=+1; (5) n=2,l=0,m=-1; (6) n=2,l=3,m=+2
下列各组量子数哪些是不合理的,为什么? (1) n=2,l=1,m=0; (2) n=2,l=2,m=-1; (3) n=3,l=0,m=0; (4) n=3,l=1,m=+1; (5) n=2,l=0,m=-1; (6) n=2,l=3,m=+2
国标规定的画图放大比例是()。 A: l:2 B: 2:1 C: 1:l D: 1:5
国标规定的画图放大比例是()。 A: l:2 B: 2:1 C: 1:l D: 1:5
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,s=+1/2 B: n=4,l=5,m=-1,s=+1/2 C: n=3,l=3,m=+1,s=-1/2 D: n=4,l=2,m=+3,s=-1/2
下列各组量子数中,合理的一组是 A: n=3,l=1,m=+1,s=+1/2 B: n=4,l=5,m=-1,s=+1/2 C: n=3,l=3,m=+1,s=-1/2 D: n=4,l=2,m=+3,s=-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 = 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
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 =