问题
选择题
The mother rushed to the hospital_____she heard her son was injured in a traffic accident.
A．in a minute
B．for a moment
C．at the moment
D．the moment
答案
答案：D
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The mother rushed to the hospital_____she heard her son was injured in a traffic accident.
A．in a minute
B．for a moment
C．at the moment
D．the moment
答案：D
(12分)根据下表左边的“实验操作”，从右边的“实验现象”中选择正确的字母代号，填入对应“答案”的空格中。
| 实验操作 | 答案 | 实验现象 |
| (1)让一束光线通过Fe(OH)3胶体 | A.呈蓝色 B.生成白色胶状沉淀 C.呈现光亮“通路” D.产生红褐色沉淀 | |
| (2)向盛有FeCl3溶液的试管中加入NaOH溶液 | ||
| (3)向Al2(SO4)3溶液中滴加氨水 | ||
| (4)向土豆片上滴加碘水 |