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, we have 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) 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】According to the article, eating carrots ________.

A.stops the brain from seeing

B.doesn't help you see better at all

C.will help you see clearly in the dark

D.is good for your eyes to some degree

【2】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%

【3】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.

【4】Which statement is RIGHT?

A.You can have superhuman vision after eating a large number of carrots.

B.If your parents have bad eyesight. You might still have good vision.

C.Color blind people see the world in black and white.

D.It's unnecessary to protect our eyes.

【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】D

【2】A

【3】C

【4】B

【5】B

【解析】

本文從科學(xué)角度解釋了關(guān)于視力的三個(gè)誤解。

【1】

細(xì)節(jié)理解題。根據(jù)A certain minimum amount will help, but a large number of carrots will not give you superhuman vision“一定數(shù)量的胡蘿卜會有幫助，但是大量的胡蘿卜不會給你超人的視覺”，可知，吃胡蘿卜在某種程度上對你的眼睛有好處。故選D。

【2】

細(xì)節(jié)理解題。根據(jù)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“美國驗(yàn)光協(xié)會的一項(xiàng)研究表明，如果父母雙方都是近視，他們的孩子有33%-60%的機(jī)率近視”，可知，父母雙方都是近視，他們的孩子有好視力的機(jī)率是40%-67%。故選A。

【3】

細(xì)節(jié)理解題。根據(jù)If these cells don't work properly, color blindness occurs，可知，色盲是由于視錐細(xì)胞不工作造成的。故選C。

【4】

推理判斷題。根據(jù)A certain minimum amount will help, but a large number of carrots will not give you superhuman vision，可知，一定數(shù)量的胡蘿卜會有幫助，但是大量的胡蘿卜不會給你超人的視覺，所以A選項(xiàng)錯誤。根據(jù)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“美國驗(yàn)光協(xié)會的一項(xiàng)研究表明，如果父母雙方都是近視，他們的孩子有33%-60%的機(jī)率近視”，可知，如果你的父母視力都不好，你可能會有好視力的機(jī)率，所以B選項(xiàng)正確。根據(jù)They usually can't tell certain colors apart, especially green and red，可知，色盲的人通常是無法區(qū)分某些顏色，所以C選項(xiàng)錯誤。根據(jù)常識，可知，眼睛是我們身體最重要的器官之一，所以保護(hù)眼睛是很有必要的，所以D選項(xiàng)錯誤。故選B。

【5】

主旨大意題。根據(jù)Below, we have picked out scientific explanations for three mistakes that people make about their eyes. Let's take a look“以下我們挑選出人們對眼睛經(jīng)常犯的三個(gè)錯誤的科學(xué)解釋”，可知，本文的目的是澄清對我們眼睛的一些誤解。故選B。