阅读理解

    I'm Li Ming．The holidays always make me happy．Last summer holiday,I went to Paris with my mother by plane．We went there to visit my uncle．He met us at the airport．

    My uncle took us to visit the Louvre Museum by underground．I saw a lot of famous things．I enjoyed many old pictures in it．The pictures were very creative(有创意的)．We also visited the Eiffel Tower．It is the famous symbol(标志)of Paris．One evening，my uncle took us to eat good food and go shopping．My mother bought many clothes-some for her,and some for my sister．

We stayed in Paris for about half a month.The trip gave me lots of fun.I will remember it.

根据材料内容选择最佳答案。

下面是蛙的的生殖和发育的几个时期：①排卵排精②雌雄抱对③雄蛙鸣叫④受精卵孵化为蝌蚪⑤蝌蚪变态发育为蛙⑥精卵结合成受精卵。排序正确的一组是（    ）。