I went to Australia for summer holiday with my parents last year. I was so excited about the 1.

    We did many things there. The first day, we 2 Sydney. We had some 3food for lunch there. After lunch，we went to a big 4 . We saw tigers and koalas. The animals weren't 5 of people.

    6that, we had a walk and we 7 at a restaurant. We went back to the 8 to rest at 9: 00 in the evening. I was very 9. But I really 10 myself. I hope to go there again.

在植物细胞生长的过程中，细胞内最明显的变化是（  ）

①把叶片放到装有酒精的烧杯中隔水加热

②把天竺葵放在光下照射

③用黑纸片把天竺葵叶片遮盖一部分

④把天竺葵放在黑暗处一昼夜

⑤把部分遮光的叶片摘下，去掉黑纸片

⑥用清水漂洗叶片后滴加碘液