| If we observe carefully, we van find that most of the flowers in nature are red, orange and yellow. If we have seen a black flower, it’s a chance in million . People have made a census(普查)to colours of more than four thousand kinds of flowers and discovered that only eight of them are black. Why? As we know, sunlight is formed by seven different kinds of coloured light. The wave length of each light changes, so the quantity of heat in each light changes, too. Flowers, especially their petals(花瓣), are very delicate(纤弱) and prone(易于) to the harm caused by high temperature. Black flowers can take in all the light waves, which cause the flowers to dry up in a high temperature. So black flowers can rarely survive sunlight. But red flowers, orange flowers and yellow flowers can protect themselves from sunlight by reflecting the red light, orange light and yellow light, each of which has a large quantity of heat. That is why red, orange and yellow flowers are very common in nature while black flowers are so rare. 小题1:We can hardly find black flowers because _____.
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该名网友总共回答了31个问题，此问答他的回答如下：采纳率：80.6%
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2以上就是小编为大家介绍的If we observe carefully, we van find that most of the flower 的全部内容，如果大家还对相关的内容感兴趣，请持续关注上海建站网！
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