问题
选择题
._______ lying on the floor, the old man was immediately taken to hospital.
A．Finding
B．Being found
C．Found
D．Having found
答案
答案：C
搜题请搜索小程序“爱下问搜题”
._______ lying on the floor, the old man was immediately taken to hospital.
A．Finding
B．Being found
C．Found
D．Having found
答案：C
针对生活中的四组物质的鉴别，设计两种方案，其中都合理的是（ ）
| 选项 | 需区分的物质 | 方法一 | 方法二 |
| A | 硬水和软水 | 观察颜色 | 加肥皂水 |
| B | 碳铵和硝铵 | 闻气味 | 加盐酸 |
| C | 苏打溶液和小苏打溶液 | 测pH | 滴加酚酞试液 |
| D | 黄金和黄铜 | 加稀盐酸 | 放入到硫酸锌溶液中 |