题型：语法填空（语篇） 题类：常考题 难易度：困难
湖北省四校（襄州一中、枣阳一中、宜城一中、曾都一中）2018-2019学年高二下学期英语期中联考试卷（音频暂未更新）
People with colour blindness can't see colours in a normal way. Colour blindness(affect) approximately 1 in 12 men and 1 in 200 women in the world.
There are various causes of colour blindness. For the majority of colour-blind people, the condition is something they have from (bear), although some people get it later in life because of diseases.
Most colour-blind people can see things as clearly as other people, but are unable to fully "see" red, green or blue light. There are different types of colour blindness and there are extremely rare cases people are unable to see any colour at all. The (common) form of colour blindness is red/green colour blindness. Although (know) as red/green colour blindness, the form of colour blindness doesn't mean sufferers (mere) mix up red and green. It means they mix up all (colour) that have some red or green as part of the whole colour.
The effectscolour blindness can be mild, moderate (中等的) or severe. Approximately 40% of colour blind people are even unaware that they're colour blind. Statistically(speak), most people with a moderate form of red/green colour blindness can only identify 5 coloured pencils from a standard box of 24 pencil crayons.
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