Question

13．About ten men in every hundred suffer from color blindness in some way．Women are luckier； only about one in two hundred is affected in this matter．Perhaps，after all，it is safer to be driven by a woman!
    There are different forms of color blindness．In some cases a man may not be able to see deep red．He may think that red，orange and yellow are all shadows of green．Sometimes a person cannot tell the difference between blue and green．In rare cases an unlucky man may see everything in shades of green--a strange world indeed．
    Color blindness in human beings is a strange thing to explain．In a single eye there are millions of very small things called"cones"．These help us to see in a bright light and to tell difference between colors．There are also millions of"rods"，but these are used for seeing when it is near dark．They show us shape but no color．
    Some insects have favorite colors．Mosquitoes prefer blue to yellow．A red light will not attract insects，but a blue lamp will．In a similar way human beings also have favorite colors．Yet we are lucky．With the aid of the cones in our eyes we can see many beautiful colors by day，and with the aid of the rods we can see shapes at night．One day we may even learn more about the invisible colors around us．
26．The passage is mainly aboutD．
A．color and its surprising effects．
B．women being luckier than men
C．danger caused by color blindness     
D．color blindness
27．According to the passage，with the help of the"cones"，we canD．
A．tell different shapes                
B．see in a weak light
C．kill mosquitoes                    
D．tell orange from yellow
28．Why do some people say it is safer to be driven by women？B
A．Women are more careful．B．There are fewer color-blind women
C．Women are fonder of driving than men．
D．Women are weaker but quicker in thinking．
29．Which of the statements about the color-blind is true？A
A．Not all of them have the same problem in recognizing color．
B．None of them can see deep red．
C．None of them can tell the difference between blue and green．
D．All of them see everything in shades of green．
30．We can attract and kill mosquitoes by using aC．
A．red light       B．yellow light      C．blue light      D．green light．

Answer 1

分析 本文主要讲述的是色盲的话题，在文章中介绍了色盲形成的原因，并说明了昆虫对颜色的偏好．

解答 26．D 主旨大意题．根据文章第二段There are different forms of color blindness．本文主要讲述的就是色盲的话题，故D正确．
27．D 细节题．根据第二段In a single eye there are millions of very small things called"cones"．These help us to see in a bright light and to tell difference between colors．cones帮助我们辨别颜色，说明D项正确．
28．B 细节题．根据文章第一段About ten men in every hundred suffer from color blindness in some way．Women are luckier； only about one in two hundred is affected in this matter．Perhaps，after all，it is safer to be driven by a woman!说明女性色盲的笔男性少，故B正确．
29．A 推理题．根据文章第二段内容可知色盲分为很多种类，不是每个人都有同样的色盲问题，故A正确．
30．C 推理题．根据文章倒数第一段Mosquitoes prefer blue to yellow．说明蚊子喜欢蓝色的光线，故我们可以利用蓝色的光线来吸引蚊子进行捕杀．故C正确．

点评 本篇文章难点在推理判断题上．推理判断题要以表面文字为前提，以具体事实为依据进行推理，做出判断．这种推理方式比较直接，考生只要弄清事实，即可结合上下文推断出合理的结论．