Among the following alphabets, which represents the set of natural numbers?
A: [img=15x19]1803e23ed5a1d4d.png[/img]
B: [img=16x19]1803e23edda8313.png[/img]
C: [img=16x23]1803e23ee60c466.png[/img]
D: [img=13x19]1803e23eeeda8f3.png[/img]
A: [img=15x19]1803e23ed5a1d4d.png[/img]
B: [img=16x19]1803e23edda8313.png[/img]
C: [img=16x23]1803e23ee60c466.png[/img]
D: [img=13x19]1803e23eeeda8f3.png[/img]
举一反三
- Among the following alphabets, which represents the set of real numbers? A: [img=17x19]1803e23f00fc6ff.png[/img] B: [img=16x19]1803e23f094d639.png[/img] C: [img=16x23]1803e23f11ad763.png[/img] D: [img=13x19]1803e23f19b956d.png[/img]
- Among the following alphabets, which represents the set of rational numbers? A: [img=17x19]1803e23ef7a8014.png[/img] B: [img=16x19]1803e23f0073511.png[/img] C: [img=16x23]1803e23f09992a8.png[/img] D: [img=13x19]1803e23f147ace0.png[/img]
- 设随机变量[img=52x13]17e0c0edb27595a.gif[/img]，[img=60x31]17e0c0edbed05c6.gif[/img]，X与Y相互独立，则[img=90x14]17e0c0edcb304a8.gif[/img]= A: -13 B: 15 C: 19 D: 23
- 已知D(X) = 2，D(Y) = 1，X和Y的相关系数[img=109x29]180357352f85f5d.png[/img].则D(2X+Y+1) = . A: 19/3 B: 23/3 C: 28/3 D: 31/3
- 如图所示，当I1.0为“1”，指令执行后的结果MW0是（ ）。[img=390x234]180347a6ce0a1dd.png[/img] A: 0 B: 1 C: 23 D: 16 E: 23