Different from common belief, blue light may ...

Different from common belief, blue light may not have a strong negative effect as people thought-according to the scientists from the University of Manchester.

It's known that our body clock measures brightness through melanopsin(黑素蛋白)，a specialized light sensitive protein in the eye. So there has been lots of interest in studying the influence of light on the body clock. Researchers changed the make-up of short and long wavelength light, which provided a small difference in brightness, as well as changes in color. Findings suggested blue light might be troublesome to our sleep patterns.

The new research, however, used a different method, since the changes in color may oppose the benefits from reducing the brightness signals detected(探测)by melanopsin. The team used specially designed lighting to change color without changing brightness.

Findings of the new research showed that blue colors produced weaker effects on the subjects' body clock than equally bright yellow colors. "Our recognition of color comes from the retinal cone cells(视网膜锥形细胞)，and the blue color signals they supply reduce the influence of light on the body clock," explained the lead researcher. "The research shows the common view that blue light has the strongest effect on the body clock is misguided.”

According to the team, using dim(昏暗的)，cooler lights in the evening and bright warmer lights during the day may be more beneficial to ensure healthy patterns of sleep. Twilight(暮光)is both dimmer and bluer than daylight and the body clock uses both of those features to decide on the proper times to be asleep and awake.

The findings have important suggestions for the design of lighting and visual displays which aim to promote people's sleep patterns. Present technologies are mostly designed to limit our evening exposure to blue light by changing the screen color of mobile devices. The technology, however, may send the body clock mixed messages. This is because the small changes in brightness they produce come along with colors that are commonly seen during the day. So there's more for the designers to take into consideration.

Setting our body clocks in line with our social and work schedules can be good for our health, and using color correctly could be a way to help us better achieve that.

1.The writer mentions different research methods in Paragraph 2 and 3 to________.

A.suggest how the data of the research should be collected

B.explain why the findings of the old research are reasonable

C.discuss possible ways of studying the influence of blue light

D.show the progress in the methods used in the studies of blue light

2.According to the new findings, what should the designers take into consideration?

A.The changes in both colors and brightness.

B.The influence of the daylight on sleep patterns.

C.The suggestions on the proper use of mobile devices.

D.The balance between technologies and the body clock.

3.What can we learn from the new research?

A.Blue light cannot he easily detected by the body clock.

B.Blue light has the weakest effect on people's body clock.

C.Blue light is not as harmful to their sleep patterns as people thought.

D.Blue light benefits people more in their sleep patterns than yellow light.

九年级英语阅读单选困难题查看答案及解析

China and Western countries may have different cultural beliefs(信仰) about certain animals, but when it comes to pigs, somehow(不知怎的) we have the same idea – we agree that pigs are ugly and lazy.

But the truth is that pigs do have some finer qualities. And maybe there’s no better time to clear their names than now, with the end of the Year of the Pig on January 24 this year.

For starters, science long ago proved that pigs aren’t stupid at all. According to a research, “pigs are as clever as dogs and chimpanzees.” They like to play. They can remember things for a long time. And they can decide who treat them well and who don’t.

There are lovable pig characters in cartoons too. Peppa Pig, an English animated (动画的) television series that begin in 2004, has now become one of the most popular cartoons in 180 countries and areas. The four members in the cartoon’s pig family teach children from all over the world to get on well with friends. Their daily stories show that family members are the most valuable persons to cherish (珍惜). And in China, the adventures(冒险) of McDull, a piglet who works hard towards his dreams even though he seldom succeeds, have been made into films since 2001. McDull is slow and patient, and not afraid of repeated failures. He has a heart of gold.

Perhaps these are the qualities of pigs to keep in mind when we say goodbye to the Year of the Pig—their intelligence (智力), cuteness, patience and innocence(无邪).

九年级英语填空简单题查看答案及解析

China and Western countries may have different cultural beliefs about certain animals, but when it comes to pigs, we have somehow reached an agreement—that pigs are ugly, lazy, stupid and shameless.

Just look at the idioms and phrases in our languages. In Chinese, we have the likes of “Boiling a dead pig” and “A pig looking in the mirror is still a pig”. And in English, there are expressions such as “eating like a pig” and “sweating like a pig”. None of them are exactly praise.

But truth is that pigs do have some fine qualities. And maybe there’s no better time to clear their names than now, with the arrival of Year of the Pig on Chinese Spring Festival.

For starters, science had proved that pigs aren’t stupid at all. According to a paper published last year in the International Journal of Comparative Psychology, pigs are “mentally and socially similar to dogs and chimpanzees(黑猩猩)”. By training, pigs can learn some skills, such as dancing and swimming. They like to play. They have good long-term memories. And they can tell between who treat them well and those who don’t.

There are popular pig characters in cartoons too. In the UK cartoon series Peppa Pig, the four members of the cartoon’s pig family teach children from all over the world about love, friendship, and the value of family. And in China, the adventures of McDull, a piglet who works hard toward his dreams even though he keeps failing, have been recounted in films since 2001. “People care too much about the immediate results, but McDull is slow and patient, and not afraid of repeating failure,” said McDull’s creator Brain Tse. “He has a heart of gold.”

Perhaps these are the qualities of pigs to keep in heart when we celebrate the New Year—their wisdom, cuteness, patience and bravery.

1.The writer mentioned some idioms and phrases in Paragraph 2 mainly to show________.

A. all of the idioms and phrases are exactly praise

B. people all agree pigs are ugly, lazy, stupid and shameless

C. the truth that pigs do have some fine qualities

D. there’re many idioms and phrases about pigs in our languages

2.The underlined word “immediate” in Paragraph 5 may mean “__________”.

A. 立即的 B. 长远的 C. 缓慢的 D. 间接的

3.What do Paragraph 4 and Paragraph 5 mainly talk about?

A. Pigs aren’t stupid at all. B. Pigs are slow and patient.

C. Pigs have some good qualities. D. We have some cute cartoon pigs.

4.What does the writer write this article for?

A. Clearing the pigs’ names. B. Celebrating the New Year.

C. Introducing languages about pigs. D. Showing different cultural beliefs.

九年级英语阅读单选中等难度题查看答案及解析

The young from different countries_______ a lot ___________common.

A . have; in　　 B. has; on　　 C . has; in

九年级英语单项填空中等难度题查看答案及解析

Foods that are well known to you may not be familiar to people from different places around the world. Tourists and travelers often get to try some unfamiliar food. That is part of the fun of traveling. Here are four people’s experiences with foreign food.

1. Chandra is afraid to try new foods because_________.

A.she can’t eat food with beef

B. she doesn’t like their appearance

C.she doesn’t like foreign food

D. she doesn’t need any food at all

2.Nathan worked as _______ in China for a year.

A. a worker　　　　　　 B. a dentist

C.a teacher　　　　　　 D. a student

3.The passage tells us that ___________.

A.David King often drinks milk

B. flake and shark are the same fish

C.a Hindu eats meat from the cow

D. the egg is put in the earth for a hundred years

九年级英语阅读理解中等难度题查看答案及解析

Foods that are well known to you may not be familiar to people from different places around the world. Tourists and travelers often get to try some unfamiliar food. That is part of the fun of traveling. Here are four people’s experiences with foreign food.

1.David King is a student in France and he comes from________.

A.China　　　　　　　　 B. Sweden　　　　　　 C.India　　　　　　　　 D. America

2..Birgit ordered _____in a restaurant during her vocation in Australia.

A. cheese　　　　　　　 B. eggs

C. hamburgers　　　　 D. flake

3.Chandra is afraid to try new foods because_________.

A.she can’t eat food with beef

B. she doesn’t like their appearance

C .she doesn’t like foreign food

D. she doesn’t need any food at all

4.Nathan worked as _______ in China for a year.

A. a worker　　　　　　 B. a dentist

C.a teacher　　　　　　 D. a student

5.The passage tells us that ___________.

A.David King often drinks milk

B. flake and shark are the same fish

C .a Hindu eats meat from the cow

D. the egg is put in the earth for a hundred years

九年级英语阅读单选中等难度题查看答案及解析

Foods that are well known to you may not be familiar to people from different places around the world. Tourists and travelers often get to try some unfamiliar food. That is part of the fun of traveling. Here are four people’s experiences with foreign food.

1.David King is a student in France and he comes from________.

A.China　　　　　　　　 B. Sweden　　　　　　 C.India　　　　　　　　 D. America

2..Birgit ordered _____in a restaurant during her vocation in Australia.

A. cheese　　　　　　　 B. eggs

C. hamburgers　　　　 D. flake

3.Chandra is afraid to try new foods because_________.

A.she can’t eat food with beef

B. she doesn’t like their appearance

C .she doesn’t like foreign food

D. she doesn’t need any food at all

4.Nathan worked as _______ in China for a year.

A. a worker　　　　　　 B. a dentist

C.a teacher　　　　　　 D. a student

5.The passage tells us that ___________.

A.David King often drinks milk

B. flake and shark are the same fish

C .a Hindu eats meat from the cow

D. the egg is put in the earth for a hundred years

九年级英语阅读理解中等难度题查看答案及解析

Foods that are well known to you may not be familiar to people from different places around the world. Tourists and travelers often get to try some unfamiliar food. That is part of the fun of traveling. Here are four people’s experiences with foreign food.

1.Chandra is afraid to try new foods because_________.

A. she can’t eat food with beef

B. she doesn’t like their appearance

C. she doesn’t like foreign food

D. she doesn’t need any food at all

2.Nathan worked as _______ in China for a year.

A. a worker　　 B. a dentist

C. a teacher　　 D. a student

3.The passage tells us that ___________.

A. David King often drinks milk

B. flake and shark are the same fish

C. a Hindu eats meat from the cow

D. the egg is put in the earth for a hundred years

九年级英语阅读理解中等难度题查看答案及解析

When the Audet family turns on the lights at Blue Farm, they are using electricity that comes from cows—cow manure (粪肥), to be specific.

Cows produce a lot of wastes. One cow can create 30 gallons of wastes each day. Now imagine the output of over 1,000 cows at Blue Farm. That’s really a big amount.

When farmers clean their barns, they put the wastes in a big heap, and spread some of them on their fields for fertilizer(肥料). But now places like Blue Spruce Farm have a new way of using cow wastes. They use them to produce electricity.

Here’s how it works: A big machine moves back and forth cleaning the barn floor. “The cows aren’t bothered,” says Marie Audet. “They are animals of habit; they get used to it, and just lift one foot and then another to let it go by.”

The machine pushes the manure into a big 600-gallon tank like a small swimming pool. The tank is called a digester (化粪池) because what happens there is just like what happens inside a cow: Bacteria(细菌) get to work and continue to digest the manure.

Methane gas (甲烷、沼气)in the atmosphere is known as a “greenhouse” gas because it keeps heat just like a greenhouse does, causing our planet to warm up. That’s an environmental concern. But the digester has a good result. Its gas is kept and used to power electric generators (发电机).

At Blue Farm, the generators make enough electricity to power 400 homes. The Audet family sells the extra electricity they can’t use themselves.

1. We learn from the text that the Audet family is using cow wastes to ______.

A. make electricity           B. produce fertilizer       C. build their farm     D. feed the cows

2. How are the cow wastes collected into the digester at Blue Farm?

A. Marie Audet does the work                          B. The job is done by machine

C. The cows lift the cow wastes                         D. Bacteria get to work on them

3. According to the passage, which of the following is changed into electricity?

A. The power of moving water.                         B. The heat of burning coal.

C. The power of sunlight.                           D. The heat of the methane gas

4.The new way of using cow wastes at Blue Farm might be best described as ______.

A. reducing                   B. saving                   C. recycling            D. changing

5. What is the main purpose for writing the passage?

A. To introduce a new way of making electricity           B. To explain how a new energy works better

C. To show a new rebuilding plan for a big farm           D. To explain the reasons for green house effect

九年级英语阅读理解简单题查看答案及解析

When the Audet family turns on the lights at Blue Farm, they are using electricity that comes from cows—cow manure (粪肥), to be specific.

Cows produce a lot of wastes. One cow can create 30 gallons of wastes each day. Now imagine t he output of over 1,000 cows at Blue Farm. That’s really a big amount.

When farmers clean their barns, they put the wastes in a big heap, and spread some of them on their fields for fertilizer(肥料). But now places like Blue Spruce Farm have a new way of using cow wastes. They use them to produce electricity.

Here’s how it works: A big machine moves back and forth cleaning the barn floor. “The cows aren’t bothered,” says Marie Audet. “They are animals of habit; they get used to it, and just lift one foot and then another to let it go by.”

The machine pushes the manure into a big 600-gallon tank like a small swimming pool. The tank is called a digester (化粪池) because what happens there is just like what happens inside a cow: Bacteria(细菌) get to work and continue to digest the manure.

Methane gas (甲烷、沼气)in the atmosphere is known as a “greenhouse” gas because it keeps heat just like a greenhouse does, causing our planet to warm up. That’s an environmental concern. But the digester has a good result. Its gas is kept and used to power electric generators (发电机).

At Blue Farm, the generators make enough electricity to power 400 homes. The Audet family sells the extra electricity they can’t use themselves.

1.We learn from the text that the Audet family is using cow wastes to ______.

A. make electricity　　 B. produce fertilizer

C. build their farm　　 D. feed the cows

2.How are the cow wastes collected into the digester at Blue Farm?

A. Marie Audet does the work

B. The job is done by machine

C. The cows lift the cow wastes

D. Bacteria get to work on them

3. According to the passage, which of the following is changed into electricity?

A. The power of moving water.

B. The heat of burning coal.

C. The power of sunlight.

D. The heat of the methane gas

4.The new way of using cow wastes at Blue Farm might be best described as ______.

A. reducing　　 B. saving

C. recycling　　 D. changing

5.What is the main purpose for writing the passage?

A. To introduce a new way o f making electri city

B. To explain how a new energy works better

C. To show a new rebuilding plan for a big farm

D. To explain the reasons for green house effect

九年级英语阅读理解中等难度题查看答案及解析