等体积等物质的量浓度的Ba（OH）2溶液和HCI溶液混合，加入石蕊试_爱下问搜题

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问题单项选择题

等体积等物质的量浓度的Ba（OH）₂溶液和HCI溶液混合，加入石蕊试液后，溶液颜色为（）。

A.蓝色

B.红色

C.紫色

D.无色

答案

参考答案：A

填空题

用方框中所给单词的正确形式填空。

look through, get along, cross, make,help ... with

1. Mr Zhang teaches us maths and he            it  very interesting.
2. When the light is red, you can't _           the street.
3. I            well        my pen pals and they make me their best friend.
4. My mother was ill, so I _           herhousework.
5. If you want to find a better job, you can           the Internet.

问答题简答题

文物分为珍贵文物和一般文物。请问其中珍贵文物分为几级？