Which of the following formulas is correct for magnesium oxide?
A: [img=47x23]18034caab002614.png[/img]
B: [img=40x23]18034caab8b6e26.png[/img]
C: [img=34x19]18034caac2013d6.png[/img]
D: [img=37x19]18034caacae8554.png[/img]
A: [img=47x23]18034caab002614.png[/img]
B: [img=40x23]18034caab8b6e26.png[/img]
C: [img=34x19]18034caac2013d6.png[/img]
D: [img=37x19]18034caacae8554.png[/img]
举一反三
- Which of the following formulas is correct for tin (II) oxide? A: SnO B: [img=42x22]18034caa97d59a3.png[/img] C: [img=42x22]18034caa9fd8b4a.png[/img] D: [img=42x22]18034caaa7e8b1f.png[/img]
- Which of the following formulas is correct for iron(III) oxide? A: FeO B: [img=40x22]18034caa951de1d.png[/img] C: [img=40x22]18034caa9cddb62.png[/img] D: [img=47x22]18034caaa50c5a1.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
- 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]