A:氯化钙溶液中通入二氧化碳气体:Ca2++CO2+H2O=CaCO3↓+2H+
B:次氯酸钙溶液中通人少量SO2气体:Ca2++2ClO一+SO2+H2O=CaSO3↓+2HClO
C:醋酸和碳酸氢钠溶液混合:CH3COOH+HCO3-=CO2↑+H2O+CH3COO-
D:碳酸氢镁溶液中加入过量石灰水:
I'm________about what I say because careless remarks are likely to hurt others' feelings.
英汉互译
下面关于生物分类的叙述,正确的是( )