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问题 选择题

下列是有关生物实验的四幅图。有关叙述正确的是

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A．图①由甲转换到乙后，视野中可观察到的细胞将更多

B．图②所示的视野中，和细胞A处于同一时期的细胞所占比例最高

C．图③中的植物细胞液浓度一定小于外界溶液浓度

D．图④可以表示以发黄的菠菜叶片为材料，提取、分离色素后的结果

答案

答案：D

问答题 简答题

万用表的使用及注意事项？
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填空题

根据句意，用适当的单词填空

1. My sister is __________, so I have take good care of her at home.

2. __________ the end of the day, we clea'ned the classroom and left for home happily.

3. I don't have __________ money to buy such an expensive MP5 player.

4. Peter,  this is my new car.  Would 'you like to go for a __________ with me in this' afternoon?

5. You should __________ your answers before you hand in(上交) your papers.
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