题目

下列反应的离子方程式正确的是 A．把金属铁放入稀硫酸中  2Fe＋6H＋＝2Fe3＋＋3H2↑ B．FeS和稀硝酸反应     FeS+2H+=Fe2++H2S↑     C．向Ca(HCO3)2溶液中加入足量的氢氧化钠溶液Ca2＋＋HCO3－＋OH－＝CaCO3↓＋H2O D．向NH4HSO4稀溶液中逐滴加入Ba(OH)2稀溶液至刚好沉淀完全     NH4＋＋H＋＋SO42－＋Ba2＋＋2OH－＝NH3·H2O＋BaSO4↓＋H2O请你用所给动词的适当形式填空。小题1:My parents and I _______________ (go) on vacation tomorrow.小题2:Last weekend our class _______________ (have) fun camping.小题3:Lisa and Laura _______________ (take) guitar lessons next year.小题4:Every morning he _______________ (go) to school at around six thirty.小题5:Finally, _______________ (add) a little salt and pepper in the vegetable soup.