问题
选择题
Being able to speak another language fluently could be a great ___when you are looking for a job. [ ]
A. advantage
B. chance
C. help
D. importance
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Being able to speak another language fluently could be a great ___when you are looking for a job. [ ]
A. advantage
B. chance
C. help
D. importance
答案：A
除去下列物质中所含杂质(括号内为杂质)，所加试剂及操作方法正确的一组是( )
| }选项 | 待提纯的物质 | 选用的试剂 | 操作方法 |
| A | Mn02(KCl) | 水 | 过滤、结晶 |
| B | NH3(H20) | 浓硫酸 | 洗气 |
| C | CuO(C) | 氧气 | 点燃 |
| D | CuS04(H2S04) | 铜 | 过滤 |