题目

 FeC13、CuCl2的混合溶液中加入一定量铁粉充分反应，则下列判断正确的是 A．若有固体剩余则固体中一定含Cu            B．溶液中一定含Fe2+、Cu2+ C．若有固体剩余，溶液中一定不含Cu2+                 D．加入KSCN溶液一定不变红色 答案：A You can only be sure of __________ you have at present; you cannot be sure of something __________ you might get in the future. A. that; what   B. what; / C. which; that D. /; that