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Most of the flowers in nature are red,orange and yellow.(1)I___ we have seen a black flower,it's a chance in a million.
People have (2)m___ a survey of colors of more than four thousand kinds of flowers and (3)d___ that only eight of them are black.
(4)A___ we know,sunlight is formed by seven diffferent coloured lights.The wave length of each light is (5)d___,so the heat in each light is also different.Flowers are (6)e___ to be harmed by high temperatures.
Black flowers can (7)t___ in all the light waves which cause the flowers to dry up in a high temperature.So black flowers can (8)h___ survive sunlight.But the red flowers,orange flowers and yellow flowers can (9)p___ themselves from sunlight (10)b___ reflecting the red light,orange light and yellow light,each of which has a lot of heat.

解答:

1.if
2.made
3.discovered
4.as
5.different
6.easy
7.
8.hardly
9.protect
10.

知识有限,不保证全正确哦~