题型:补全对话,情景问答 选择方框中适当的语句补全对话。A. How about some apple juice? B. Can I get you something? C. Here you are. That's $ 2.70. D. Here you are. That's $ 2.17. E. Anything to drink? F. Oh, you are right.A: 1_____B: Yes, a hamburger, please. A: 2_____B: Oh, yes. I'm thirsty now. A: 3_____B: Oh, no. I'd like a glass of vegetable juice. Er, um, tomato juice, please. A: 4_____B: I think it's wrong. It can't be $ 2.70! It's $ 2.17! A: 5_____ 查看答案
题型:选择题 向含有Cu(NO3)2、Zn(NO3)2、Fe(NO3)3、AgNO3各0.1 mol的混合溶液中加入0.1 molFe,充分搅拌后Fe溶解,溶液中不存在Fe3+,同时析出0.1 mol Ag.。下列结论错误的是 A.氧化性:Zn2+>Cu2+>Fe3+>Ag+B.Fe3+的氧化性大于Cu2+C.溶液中Cu2+与Fe2+的物质的量比为1∶2D.1 mol Fe可还原2 mol Fe3+ 查看答案