A：一定量的碳酸氢钠溶液中加入足量澄清石灰水 HCO3﹣+Ca2++OH﹣═CaCO3↓+H2O
B：漂白粉的稀溶液中通入过量SO2气体 Ca2++2ClO﹣+SO2+H2O═CaSO3↓+2HClO
C：已知电离平衡常数：H2CO3＞HClO＞HCO3﹣，向NaClO溶液中通入少量二氧化碳：2ClO﹣+CO2+H2O═2HClO+CO32﹣
D：Ba（OH）2溶液加入过量NaHSO4溶液中：H++SO42﹣+Ba2++OH﹣═BaSO4↓+H2O
给出如下四个命题①若“p且q”为假命题，则p、q均为假命题②命题“若xy=0则x=0或y=0”的否命题为“若xy≠0,则x≠0且y≠0”③“任意x∈R,x2+1≥1”的否定是“存在x∈R,x2+1≤1”④在△ABC中，“A>B”是“sinA>sinB”的充要条件其中正确的命题的个数是（ ）
A：Hi，Jenny!____
B：I want to join the Sports Club．What about you?
A：____
B：Really?What can you do?
B：Well，do you want to join the Piano Club or the Guitar Club?
A：I want to join the Piano Club,but I also want to join the Guitar Club．
B：I see．____
A：Sounds great．
B：____
A：OK
A．I want to join the Music Club．
B．You can join the two clubs．
C．What club do you want to join?
D．I call play the guitar and the piano．
E．Let's go.
关于祖国宝岛台湾和雪域高原青藏地区的叙述错误的一项是（ ）
