探究：叶绿素的形成与光照的关系．

阅读下面的资料，它会给你的探究活动提供一些启示．

韭菜与韭黄是我们常吃的蔬菜，它们都是通过韭菜的幼芽发育而来的．韭菜长在阳光下，是绿色的．如果把黑色的塑料薄膜覆盖在将要发芽的韭菜植株上，生长出来的就是浅黄色的韭黄了．如果给予生长中的韭黄以光照，过一段时间后，它又变成绿色的韭菜了．

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    My name is Zhao Kai. This weekend I plan a dream day. I will get up very late. After I wash my face , I am going out to 1  morning exercises. At about 8:20 a. m., After I eat my 2, I am going to a shopping centre  3   my mother. The shopping centre is 4our home, so we will walk there. It 5 us about 20 minutes to get there on foot. The shopping centre has a good  6 . It is called "新兴购物中心" in Chinese. It doesn't have an  7   name. Can you help to put it into English? It is new  8  big.      9  many things there, such as TVs, fridges, bikes, computers, clothes, books, food and drinks. There are many   10  there. There are men and women, old and  11  . Parents must  12 their children. The shopping centre is so big. Young children may get lost in it. 13do many people come here to buy things? Do you know? Let me tell you. The things there are good and14 . The workers there are nice and friendly. If you come to my home, I can take15 there and have a look.