Question

【題目】 Has anyone ever told you that eating carrots will help you see in the dark?This is just one of many incorrect beliefs you may have heard. Below, TEENS has picked out scientific explanations for three mistakes that people make about their eyes. Let’s take a look.

Can eating carrots improve your eyesight?

Carrots are rich in vitamin A, which helps the eyes to turn light into information for your brain. This allows people to see in darker places.However, eating more carrots won’t help you see better. A certain minimum amount will help, but a large number of carrots will not give you superhuman vision.

If your parents have bad eyesight, will you have bad eyesight, too?

Myopia(近視)can be passed from parents to children. A study by the American Optometric Association found that if both parents are myopic, there’s a 33 to 60 percent chance that their child will be. For children who have one parent with myopia, the chance is 23 to 40 percent, and it’s down to 6 to 15 percent for kids with non-myopic parents. So if your eyesight is bad, your children might still have good vision.

Do color blind people see the world in black and white?

Color blindness doesn’t usually mean that people see the world like an old movie. They usually can’t tell certain colors apart, especially green and red. Another commonly confused pair of colors is yellow and blue.Our eyes have cone cells(視錐細(xì)胞)that sense different wavelengths (波長(zhǎng))of light. If these cells don’t work properly, color blindness occurs.

There are different levels of color blindness. Some people are only color blind in low light.

However, in the most serious form of color blindness, everything is shades of gray.

【1】Which can help the eyes to turn light into information for the brain?

A.vitamin AB.vitamin BC.vitamin CD.vitamin D

【2】According to the article, eating carrots_____.

A.stops the brain from seeing

B.doesn’t help you see better at all

C.will give you superhuman vision.

D.is good for your eyes to some degree

【3】If both parents have myopia, their child’s chance of having good eyesight is_____.

A.40-67%B.33-60%C.23-40%D.6-15%

【4】What is the cause of color blindness, according to the text?

A.Watching movies for too long.

B.Getting too little exercise.

C.Cone cells not working properly.

D.Changes in the wavelength of light.

【5】What is the purpose of the article?

A.To offer some advice on protecting your eyes.

B.To clear up some misunderstandings about our eyes.

C.To provide help for improving your vision.

D.To explain how bad eyesight and color blindness form.

Answer 1

【答案】

【1】A

【2】D

【3】A

【4】C

【5】B

【解析】

本文對(duì)于傳統(tǒng)的關(guān)于保護(hù)眼睛的幾個(gè)錯(cuò)誤認(rèn)識(shí)進(jìn)行了科學(xué)的解釋。

【1】

細(xì)節(jié)理解題。根據(jù)文中“Carrots are rich in vitamin A, which helps the eyes to turn light into information for your brain.”可知，維生素A可以幫助眼睛把光轉(zhuǎn)化為大腦的信息，故選A。

【2】

細(xì)節(jié)理解題。根據(jù)文中“A certain minimum amount will help, but a large number of carrots will not give you superhuman vision.”可知，一定數(shù)量的胡蘿卜會(huì)有幫助，但大量的胡蘿卜不會(huì)給你超人的視力。故選D。

【3】

推理判斷題。根據(jù)文中“if both parents are myopic, there’s a 33 to 60 percent chance that their child will be. ”如果父母雙方都近視，他們的孩子有33%到60%的幾率近視。可知，那么孩子有好的視力的幾率就是40%—67%，故選A。

【4】

細(xì)節(jié)理解題。根據(jù)文中“Our eyes have cone cells(視錐細(xì)胞)that sense different wavelengths (波長(zhǎng))of light. If these cells don’t work properly, color blindness occurs. ”我們的眼睛有視錐細(xì)胞，可以感知不同波長(zhǎng)的光。如果這些細(xì)胞不能正常工作，就會(huì)出現(xiàn)色盲可知，視錐細(xì)胞不能正常工作的時(shí)候，就會(huì)出現(xiàn)色盲。故選C。

【5】

主旨大意題。根據(jù)文章的理解可知，本文是對(duì)關(guān)于眼睛的幾個(gè)錯(cuò)誤認(rèn)識(shí)給予了科學(xué)解釋，由此可以判斷出本文的寫作目的是為了消除關(guān)于眼睛的幾個(gè)誤會(huì)。故選B。