题目

Where is Sandy now?A. In America. B. In Japan. C. At home. 答案：【答案】B【解析】W: Did Sandy come back from America last week?M: Yes, but she was at home for only three days before she went to Japan.13．下列物质转化在给定条件下能实现的是（　　）①Al→Al2O3 $→_{△}^{NaOH（aq）}$NaAlO2（aq）$\stackrel{CO_{2}}{→}$Al（OH）3②S $\stackrel{O_{2}/点燃}{→}$SO3 $\stackrel{H_{2}O}{→}$H2SO4③NaOH（aq）$\stackrel{足量CO_{2}}{→}$NaHCO3$\stackrel{△}{→}$Na2CO3④Fe2O3 $\stackrel{HCl（aq）}{→}$FeCl3（aq） $\stackrel{△}{→}$无水FeCl3．A．①③B．②③C．②④D．①④