单项选择题

One is considered as a color blind man if ______.

A．he can see the difference between red and deep red
B．he can see the difference between blue and green
C．he can't tell the difference between orange and green
D．he thinks green is the same as blue

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热门试题

单项选择题

The idea of this article is that ______.

A．birds are important in our lives
B．animals are important in our lives
C．nature is important in our lives
D．Audubon was especially interested in birds

单项选择题

How did the members of the Society try to improve the environment

A．They made laws that protect birds.
B．They taught young people, helped pass laws that protect animals and so on.
C．They tried to make the world better.
D．Both Ｂ and Ｃ.