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A recent study has found that being exposed to low temperatures creates more good fat which burns calories in the body. Being cold is similar to the effects of exercise, protecting against being too fat and improving health. The researchers have discovered that exposure to cold changes the make-up of gut bacteria (肠道细菌), which can lead to burning fat and reduce body weight.

While ordinary white fat, known as bad fat, piles on when we eat more calories than we burn, brown fat seems to burn extra calories to produce heat. Babies have lots of brown fat — they need it to keep warm — but there are small amounts in the necks of adults, too. Studies have shown that staying in a cold environment can speed the formation of more brown fat in the body.

Researchers predicted the health benefits of being exposed to cold may have something to do with gut bacteria. They exposed the first group of mice to a cold temperature of 6℃for up to 10 days and discovered this caused a major change in the make-up of the mice’s gut microbes (微生物), preventing the mice from gaining weight.

Then, the gut bacteria were put into the second group of mice that did not have gut microbes. It was found that they increased tolerance (忍耐力) to cold temperatures. The mice also lost weight as the changes in gut bacteria promoted the formation of brown fat. However, after three weeks of cold exposure, the body weight began to remain stable.

Professor Mirko Trajkovski said, that they provide powerful evidence that gut microbes play a key role in people’s ability to adapt to the environment. They are excited about testing whether gut microbes could be a promising approach to preventing being fat.

【小题1】What’s the new result of the recent study?
A.Good fat has nothing to do with calories.B.Exercise can change the make-up of gut bacteria.
C.Being cold helps people lose weight.D.Gut bacteria will stop producing brown fat.
【小题2】What do we know about brown fat?
A.It’s usually considered as bad fat.B.It fails to produce in a cold environment.
C.It can’t be found in the bodies of adults.D.It burns more calories in low temperatures.
【小题3】With the gut bacteria, the second group of mice ________.
A.kept losing weight every dayB.had much less brown fat in the cold
C.gained a better ability to stand the coldD.could produce more bad fat in the body
【小题4】According to Mirko Trajkovski, the result ________.
A.could provide new treatment for overweight people
B.shows people how to get used to the cold
C.makes people realize the importance of keeping warm
D.may cause more people to take exercise
21-22高一下·贵州六盘水·期中
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Officials say climate change is starving Alaska’s salmon

Alaska’s Yukon River has faced major salmon shortages in recent years. 【小题1】 Officials say record-high temperatures last year killed most salmon in the 3,200-kilometre river before the fish were able to reproduce.

【小题2】 Fishing experts say young salmon are likely filling up on nutrient-poor food like jellyfish because warmer waters drive away healthier organisms they normally feed on. “In my opinion, the salmon are starving with climate change,” said Brooke Woods. She is with the Yukon River Inter-Tribal Fish Commission in the Athabascan village of Rampart.

The collapsed Yukon River salmon harvests caused major financial losses to private fishing companies in the area. In 2020, fishing companies on the Yukon River earned a combined $51,480. 【小题3】 The die-offs also hurt native communities, which traditionally store the fish as a year-round food supply.

The losses led both Alaska and Canada to halt their salmon harvests in 2021 in order to make sure that enough fish survived to reproduce for another year. Alaska has sent emergency fish shipments to areas affected by the salmon shortages.

The effects of climate change on freshwater environments have also been studied. Vanessa von Biela is a US Geological Survey research biologist who looked at the rivers, streams and lakes where salmon spend early and late periods of the lives. 【小题4】 They start dying above 20 Celsius.

“Salmon will find a way,” said biologist von Biela. “But it is going to be hard for communities that are in places where there might not be salmon any more.”

A.By comparison, they earned $2. 5 million in 2019 and $4.67 million in 2018.
B.But in 2019, temperatures on the Alaskan side were above 18 degrees Celsius for 44 straight days, a recent study found.
C.The shortages are blamed on warming waters.
D.Her team found that Chinook salmon show heat stress at temperatures above 18 degrees Celsius.
E.The shipments came from more productive fisheries in the south-western fishing community of Bristol Bay and other areas.
F.Climate change may also be affecting what the salmon are eating.

Not long ago, people thought babies were not able to learn things until they were five or six months old. Yet doctors in the United States say babies begin learning on their first day of life. Scientists note that babies are strongly influenced by their environment. They say a baby will smile if her mother does something the baby likes. A baby learns to get the best care possible by smiling to please her mother or other caregivers. This is how babies learn to connect and communicate with other human beings. One study shows that babies can learn before they are born. The researchers placed a tape recorder on the stomach of a pregnant woman. Then, they played a recording of a short story. On the day the baby was born, the researchers attempted to find if he knew the sounds of the story repeated while in his mother. They did this by placing a device in the mouth of the newborn baby.

The baby would hear the story if he moved his mouth one way. If the baby moved his mouth the other way, he would hear a different story. The researchers say the baby clearly liked the story he heard before he was born. They say the baby would move his mouth so he could hear the story again and again.

Another study shows how mothers can strongly influence social development and language skills in their children. Researchers studied the children from the age of one month to three years. The researchers attempted to measure the sensitivity of the mothers. The women were considered sensitive if they supported their children’s activities and did not interfere(干预) unnecessarily. They tested the children for thinking and language development when they were three years old. Also, the researchers observed the women for signs of depression. The children of depressed women did not do as well in tests as the children of women who did not suffer from depression. The children of depressed women did poorly in tests of language skills and understanding what they hear.

These children also were less cooperative and had more problems dealing with other people. The researchers noted that the sensitivity of the mothers was important to the intelligence development of their children. Children did better when their mothers were caring, even when they suffered from depression.

【小题1】According to the passage, which of the following is NOT the factor that influences intelligence development in babies?
A.The environment.B.Their peers
C.Mother’s sensitivityD.Education before birth
【小题2】What is the purpose of the experiment in which newborn babies heard the stories?
A.To prove that babies can learn on the first day they are born
B.To show mothers can strongly influence intelligence development in their babies
C.To indicate early education has a deep effect on the babies’ language skills
D.To prove that babies can learn before they are born
【小题3】Which group of children did the worst in tests of language skills?
A.The children of women who did not suffer from depression
B.The children of depressed but caring mothers
C.The children of depressed mothers who cared little for their children
D.Children with high communication abilities
【小题4】What is the main idea of the passage?
A.Scientific findings about how intelligence develops in babies
B.Scientific findings about how babies develop before birth
C.Scientific findings about how time has an effect on babies’ intelligence
D.A study shows babies are not able to learn things until they are five or six months old

A recent study found that only eight percent of people actually end up achieving their new year’s resolution. Here’s a couple of tips and tricks on how to do just that.

【小题1】.

No one has ever said “oh, I’m going to be healthier this year” and the next day woke up healthy. There has to be a plan, goals, and action that need to be taken. So you can say something like “I’m going to go to the gym every other day this year.”

Choose resolutions wisely.

【小题2】. The majority of resolutions involve some sort of habit change, and habit changes have a huge consumption on your body’s willpower. Willpower is like a battery that needs to be charged every night. When you have too many resolutions, the burden on this battery causes it to run out before you have a chance to charge it.

Write your resolutions down.

This makes the resolution feel like a contract. 【小题3】. You can write down every resolution for the entire year. Every time you look at it, you will feel a tremendous amount of pressure to make sure that you continue to keep your resolution.

Don’t tell anyone about your new year’s resolution.

Usually, when you talk about something that you haven’t accomplished, you will trick their brains into visualizing a situation where you have accomplished it.【小题4】

Find yourself an accountability buddy.

An accountability buddy is somebody who makes sure that you’re going out there every single day, and doing the things that you promised yourself that you would do. 【小题5】. At the same time, you help them keep themselves in lines too!

A.Have a plan
B.Keep healthy
C.Don’t choose too many resolutions
D.It creates pressure for you to complete it
E.It’s interesting how physical a contract can feel
F.It’s somebody who helps you keep yourself in line
G.This causes you to lose tons of motivation that you had beforehand

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