问题
选择题
Mr. Smith wanted to buy the house and he told me that ____the house cost,it would be worth it. [ ]
A. however
B. how much
C. whatever
D. what
答案
答案:C
Mr. Smith wanted to buy the house and he told me that ____the house cost,it would be worth it. [ ]
A. however
B. how much
C. whatever
D. what
答案:C
下表列出了除去物质中所含少量杂质的方法,其中不正确的是
选项 | 物质 | 所含杂质 | 除去杂质的方法 |
A. | N2 | O2 | 将气体缓缓通过足量的灼热铜网 |
B. | NaCl | KNO3 | 冷却热饱和溶液,过滤 |
C. | Cu | Zn | 加入足量稀盐酸,充分反应后过滤,洗涤,干燥 |
D. | FeCl2溶液 | CuCl2 | 加入足量铁粉,充分反应后过滤 |