A:稀硫酸和铜粉反应可制备硫酸铜
B:碘化钾与浓硫酸反应可制备碘化氢
C:过氧化钠与二氧化碳反应可制备氧气
D:铝箔在氯气中燃烧可制备无水三氯化铝
This is my room (房间).I have a new desk and a chair.The book is on the desk.The ruler is under the book.My eraser is in the pencil box.My bag is on the chair.Where's my cat? It's under the chair.It's sleeping (睡觉).