看图读一读,连线。
① ____ A. - How is the weather? - It's cloudy.
② ____ B. I like autumn (秋天). Autumn is cool and windy.
③ ____ C. Winter is cold (冷的). We make a snowman (堆雪人).
④ ____ D. - What do you need? I need shorts.
____
(2015•襄阳)向CuO和铁粉的混合物中加入一定量的稀硫酸,微热,充分反应后冷却、过滤,在滤液中放入一枚洁净的铁钉.发现铁钉表面无任何变化,据此判断,下列结论正确的是( )