Which of the following are inorganic compounds?
A: [img=97x22]18034caec86227c.png[/img]
B: [img=64x22]18034caed0c27ce.png[/img]
C: [img=41x23]18034caed8ff03f.png[/img]
D: [img=64x22]18034caee1578ed.png[/img]
A: [img=97x22]18034caec86227c.png[/img]
B: [img=64x22]18034caed0c27ce.png[/img]
C: [img=41x23]18034caed8ff03f.png[/img]
D: [img=64x22]18034caee1578ed.png[/img]
举一反三
- 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]
- 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]
- 在下列命题中:如果f(x)=[img=28x44]17e0bf9914bb2f1.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=28x44]17e0bf992111a1c.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=55x44]17e0bf992d8de0a.png[/img],那么[img=29x29]17e0bf9939482bb.png[/img]f(x)不存在;如果f(x)=[img=87x53]17e0bf99450fa82.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0。其中错误命题的个数是( A: 0 B: 1 C: 2 D: 3
- 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
- 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