A: [img=181x23]1803c4666115c63.png[/img]
B: [img=181x23]1803c466687ca53.png[/img]
C: [img=181x23]1803c46671b8901.png[/img]
D: [img=196x27]1803c46679b4b22.png[/img]
举一反三
- 以下哪一项是不完备的右边的假设检验 A: [img=181x23]1803c4662e965fc.png[/img] B: [img=181x23]1803c4663662760.png[/img] C: [img=181x23]1803c4663e1a6a3.png[/img] D: [img=196x27]1803c46645ec25b.png[/img]
- 平板电容器内填充两层简单媒质，外加电压U，如下图所示，若介电常数[img=53x19]1802fb3ba42e144.png[/img],电导率[img=48x19]1802fb3bad3797a.png[/img],则在两种媒质的分界面上 （ ）[img=227x203]1802fb3bb76ae26.png[/img] A: [img=171x23]1802fb3bbee3703.png[/img] B: [img=181x23]1802fb3bc7ddb4f.png[/img] C: [img=181x23]1802fb3bd0c910d.png[/img] D: [img=171x23]1802fb3bd9bfdc7.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
- The weights [img=79x20]1803b6a831acc66.png[/img]in a linear combination[img=181x23]1803b6a83934bd8.png[/img]can not all be zero.
- Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
内容
- 0
Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]
- 1
设总体X在区间[12,20]上服从均匀分布. [img=78x23]17de897e59e71d1.png[/img]为来自总体X的一个简单随机样本，则[img=216x25]17de897e657483c.png[/img]______. A: 23/37 B: 37/64 C: 27/64 D: 14/37
- 2
设总体X在区间[12,20]上服从均匀分布. [img=78x23]18034e9583b88b7.png[/img]为来自总体X的一个简单随机样本，则[img=216x25]18034e958ec8685.png[/img]______. A: 23/37 B: 37/64 C: 27/64 D: 14/37
- 3
下列等值式中正确的是( )。 未知类型：{'options': ['( [img=8x14]17e4385a99bb660.jpg[/img]x)(P(x)→B) ≡ ([img=8x14]17e4385a99bb660.jpg[/img]x)P(x)→B', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(B→Q(x)) ≡B→([img=8x14]17e4385aa223929.jpg[/img]x)Q(x)', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(P(x)→B) ≡ ([img=8x14]17e4385aa223929.jpg[/img]x)P(x)→B', ' ( [img=8x14]17e4385aa223929.jpg[/img]x)(B→Q(x)) ≡B→ ([img=8x14]17e4385a99bb660.jpg[/img]x)Q(x)'], 'type': 102}
- 4
下列公式中（ ）不是命题 。 A: ([img=10x19]180361811d22e4e.png[/img]x)P(x) B: ([img=10x19]18036181259b0de.png[/img]x)P(x) C: ([img=10x19]180361811d22e4e.png[/img]x)(P(x)[img=12x16]18036181351b766.png[/img]p(y)) D: ([img=10x19]18036181259b0de.png[/img]x)([img=10x19]18036181259b0de.png[/img]y)(P(x)[img=18x11]180361814f231a2.png[/img]p(y))