问题
选择题
粗盐提纯实验的部分操作如图所示，其中错误的是（ ）
A．取一定量粗盐
B．溶解
C．过滤
D．蒸发
答案
答案：C
题目分析：根据常见仪器及化学实验基本操作分析。C、过滤操作注意事项：“一贴二低三靠”，要用玻璃棒引流，错误，故选C
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粗盐提纯实验的部分操作如图所示，其中错误的是（ ）
A．取一定量粗盐
B．溶解
C．过滤
D．蒸发
答案：C
题目分析：根据常见仪器及化学实验基本操作分析。C、过滤操作注意事项：“一贴二低三靠”，要用玻璃棒引流，错误，故选C
| Choose and fill in the blanks. 形容词大比拼。选择恰当的形容词填空。（每词限用一次） | |
1. On my birthday, my brother gives me a(n) story book. 2. We don't like documentaries (纪录片), because they're____. 3. Mr White is with his students. 4. I feel today. I think I should have a good rest. 5. My mother goes to work from Monday to Sunday. She is very____. 6. His____colour is white. 7. Her room is very____, but her bed is very small. 8. I got an "A" in this test, so I was very____. 9. Tina's dog is lost. She is very____. 10. I can't swim. I think it's so____. |