题目

Two men were sitting together in a plane. They were on a long journey. One of the men was a businessman. The other was a farmer. They sat without talking for a while, then the farmer said, “Let’s do something to pass the time.”“What do you want to do?” the businessman asked. “We can ask each other riddles.” The farmer said, “you star.” “Let’s make the rules first,” the businessman said. “That’s not fair. You are a businessman with much knowledge. You know more things than I do. I am just a farmer.”“That’s true.” The businessman said. “What do you want we s下列表中对于相关物质的分类全部正确的一组是（　　）编号纯净物混合物弱电解质非电解质A明矾蔗糖NaHCO3CO2B天然橡胶石膏NH3?H2OCH3CH2OHC冰王水H2SiO3Cl2D胆矾水玻璃H2CO3SO2 A、AB、BC、CD、D