阅读短文,选择正确答案.

题目

阅读短文,选择正确答案.
The sky usually looks light blue.But if you went to the top of the highest mountain,went to the top of the highest mountain,where there is less air between you and the sun to scatter the sunlight,the sky would be deep,dark blue.And if you rode in a rocket high above the earth,where there is no air at all to scatter the sunlight,the sky would be so dark that it would be black.Sometimes the sky doesn't look blue.At sunrise and sunset,the light from the sun sometimes is scattered in such a way that you see red,orange,and other colors in the sky.65.The sky usually looks light blue because _____.A.the sun is light and blue B.the air is light and blue C.the air scatters the sunlight D.the sunlight is blue 66.The sky looks dark blue when _____.A.there is less air between you and the sun B.there is high mountain C.the mountain is highest D.you climb a mountain
67.The sky looks black if ______.
A.you ride in a rocket
B.the rocket is high in the sky
C.the rocket is high above the earth
D.there is no air to scatter the sunlight
68.Sometimes the sky doesn't look blue because ______.
A.the sun is rising B.the sun is setting
C.the air has different colors
D.the light from the sun is scattered in a different way
69.A good title for this passage would be _______.
A.The Sky Looks Blue
B.Why the Sky Looks Colorful
C.The Beautiful Sunlight
D.Something About the Air

答案

.D,天空会是黑色,当然是因为在宇宙中没有空气折射的缘故
D,天空有时候看起来不是蓝色的,因为折射的方式不同,如日出,日落时.
B.本文是关于天空的颜色的,不止蓝色,还有深蓝,黑色,红色,桔蓝色等等.