已知集合M={0,x},N={1,2},若M∩N={2},则M∪N=()
A: {0,x,1,2}
B: {2,0,1,2}
C: {0,1,2}
D: 不能确定
A: {0,x,1,2}
B: {2,0,1,2}
C: {0,1,2}
D: 不能确定
举一反三
- 下列各组量子数合理的是( ) A: n=1, l=0, m=0, ms=-1/ 2 B: n=2, l=2, m=0, ms=1 C: n=2, l=0, m=1, ms=1/2 D: n=1, l=0, m=-1, ms=-1/2
- 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 = 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 A: ①、③、⑤ B: ②、④、⑥ C: ①、②、③ D: ①、②、④
- 下列量子数合理的是? n = 1,l = 0,m = 0|n = l,l = 1,m = 1|;n = 2,l = 0,m = 1 |n = 2,l = 2,m = 2
- 下列量子数合理的是 。 A: n = 2,l = 0,m = 1 B: n = l,l = 1,m = 1 C: n = 2,l = 2,m = 2 D: n = 1,l = 0,m = 0