A:FeSO4溶液中加入过量的稀硝酸:3Fe2++4H++NO3-===3Fe3++NO↑+2H2O
B:向Na2SO3、NaI的混合溶液中滴加少量氯水:2I-+Cl2===2Cl-+I2
C:碳酸氢钡溶液中加入过量氢氧化钠溶液:Ba2++HCO3-+OH-===BaCO3↓+H2O
D:用铜片作阴、阳极电解硝酸银溶液:4Ag++2H2O4Ag+O2↑+4H+
Judging from the message they convey, these two chapters are __________ independent of each other, that is, they are not in connection with the other at all.
—Are you charging me________lying?
—But your actions aren't consistent________your words.
李同学画了一幅其所在城镇的地图,1厘米表示1千米,那么其选用的比例尺用数字式表示是____;国际上习惯用西经20°和____这两条经线组成的经线圈作为划分东西半球的界线.
我国人口稠密的地区是在( )
下列叙述中不正确的是( )