除去下列物质中的杂质（括号内为杂质），所用的试剂或方法正确的是（ ）
A．A
B．B
C．C
D．D
A、NaCl固体混有泥沙可以通过加水溶解、过滤、蒸发，故A正确；
B、氢氧化钠能与二氧化碳反应，把原物质除去了，故B错误；
C、一氧化碳能与灼热的氧化铜反应生成二氧化碳，在氮气中引入了新的杂质，故C错误；
D、稀盐酸不能与碳反应，而与氧化铜反应，故D错误；
故选A．
| 用方框中所给词的适当形式填空。 | |
flowers in it. Now Mrs. Brown is getting some flowers from the garden. She wants 3 the flowers in the dining room and the 4 room. Susan is sitting in a chair in the garden. She 5 a book. David is saying goodbye to his mother. He often 6 his bike to school. He is a good student. He likes 7 best. He has lunch at school 8 weekdays. Mr.Brown is in London now. This afternoon he is coming back by 9 . The family will have 10 at home together this evening. |