What gestures are used when the word “love” is spelled with finger letters? [img=557x142]180319da1bc8e6a.png[/img]
A: A
B: B
C: C
D: D
A: A
B: B
C: C
D: D
A,B,C
举一反三
- What gestures are used when the word “name ” is spelled with finger letters？[img=543x103]180319d9e610180.png[/img] A: A B: B C: C D: D
- What is the pH of a buffer with the largest buffer capacity when the buffer is composed of NH3 (Kb = [img=80x24]1803a221c94490b.png[/img]) and HCl? A: 5 B: 6 C: 8 D: 9
- The saying “What on earth is this love, which makes lovers vow to stick together in life and death?” is used to described _______. A: amatory love B: family love C: fraternal love D: X
- 在三棱锥 D-ABC 中， AB = BC = CD = DA = 1，且 AB [img=14x19]1803dc554cb32e5.png[/img]BC ， CD [img=14x19]1803dc5555511e8.png[/img]DA ， M ， N 分别是棱 BC，CD 的中点，下面结论正确的是（ ） A: AC[img=14x19]1803dc555da48c5.png[/img]BD B: MN // 平面 ABD C: 三棱锥 A-CMN 的体积的最大值为[img=25x48]1803dc55673b603.png[/img] D: AD 与 BC 一定不垂直
- 设X是随机变量，且[img=139x31]1802e2aa00edf66.jpg[/img]，则D(X)=（ ）. A: 2 B: 4 C: 6 D: 8
内容
- 0
设相互独立的两个随机变量X,Y的各自的分布律为[img=538x110]1803d9d8c90255b.png[/img]则[img=125x25]1803d9d8d1ba982.png[/img] A: 1/8 B: 1/12 C: 1/2 D: 1/6
- 1
When making a loose fist, Laogong(PC 8) is just under the tip of the ( ) A: index finger B: middle finger C: ring finger D: little finger
- 2
已知随机变量X的概率密度为[img=129x66]17de92201995d30.png[/img]则E(X)=( ). A: 6 B: 3 C: 1 D: 0.5
- 3
已知随机变量X的概率密度为[img=174x59]17e0a945ec2931c.png[/img]，则E(X)= A: 0.5 B: 1 C: 3 D: 6
- 4
已知随机变量X的概率密度为[img=129x66]1803b45172559f9.png[/img]则E(X)=( ). A: 6 B: 3 C: 1 D: 0.5