题目

下列各组离子一定能大量共存的是( ) A．在含大量Fe3＋的溶液中：NH、Na＋、Cl－、SCN－ B．在强碱性溶液中：Na＋、K＋、AlO、CO C．在c(H＋)＝10－13 mol/L的溶液中：NH、Al3＋、SO、NO D．在pH＝3的溶液中：K＋、Fe2＋、Cl－、NO 答案：B听对话，回答问题。1. What does the man mean?A. They won't have any more cups.            B. He doesn't know why people like tea.C. They will get some more tea.2. When is the man going to decorate(装饰) the room?A. Wednesday     B. Saturday     C. Tuesday3. What are they talking about?A. Newpapers      B. Their feelings    C. TV programs4.What is Roy doing?A. He is calling Emma.   B. He is talking to Emma face to face.C. He is answering Emma's telephone.5. What does the man want to do?A. To change his Walkman    B. To buy a new Walkman. C. To borrow a Walkman.