问题
选择题
— Linda, you go to the airport now.
— ______?
— To meet Mr Smith from Canada. [ ]
A. When
B. Where
C. How
D. For what
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— Linda, you go to the airport now.
— ______?
— To meet Mr Smith from Canada. [ ]
A. When
B. Where
C. How
D. For what
答案：D
下列实验中利用提供的方案能达到目的的是
| 选项 | 实验目的 | 实验方案 |
| A | 除去CaO中混有的CaCO3 | 先加足量水，然后过滤 |
| B | 除去CO2中少量HCl气体 | 先通过NaOH溶液，再通过浓硫酸 |
| C | 鉴别棉线和羊毛线 | 点燃，闻产生的气味，观察生成的灰烬 |
| D | 鉴别稀盐酸和氯化钠溶液 | 滴加酚酞溶液，观察溶液颜色变化 |