★C
阅读下面短文,从每题所给的A、B、C、D四个选项中选出最佳答案.
Drinking coffee could activate the body's fat-fighting defenses, which is a discovery that could have a potential effect in the battle against obesity and diabetes. In a study, researchers said that coffee may help stimulate our brown fat reserves, also known as brown adipose tissue, which plays a key role in how quickly we can burn calories.
There are two forms of fat cells, brown cells and white cells, and each plays a different role in our body. While brown cells help generate heat, white cells are responsible for the storage of fat or energy — ready for release as needed. Levels of brown fat are known to be high in children but recent findings on the presence of brown fat in adults have restored hope to use them as targets to treat obesity.
"Brown fat works in a different way to other fat in your body and produces heat by burning sugar and fat, often in response to cold," said professor Michael Symonds. "Increasing its activity improves blood sugar control as well as improving blood lipid levels, and the extra calories burnt help with weight loss. However, until now, no one has found an acceptable way to stimulate its activity in humans."
The scientists started by testing out coffee on stem cells to see if it would stimulate brown fat. Once they found the right dose, they moved on to humans to see if the results were similar. "From our previous work, we knew that brown fat is mainly located in the neck region, so we were able to image someone straight after they had a drink to see if the brown fat got hotter," Symonds said.
"The results were positive and we now need to find out that caffeine as one of the ingredients in the coffee is acting as the stimulus or if there's another component helping with the activation of brown fat," Symonds said, "Once we have confirmed which component is responsible for this, it could potentially be used as part of a weight-management method or as part of regulation program to help prevent diabetes."
1 . What is the main idea of the passage?
A . Drinking coffee helps lose weight.
B . The obesity and diabetes are common.
C . The brown cells are harmful.
D . The best way to burn calories is swimming.
2 . Why do brown cells restore the hope of fighting obesity?
A . Because they help store fat.
B . Because they can release very soon.
C . Because they can help burn fat.
D . Because they make energy stored.
3 . What is the difficulty of improving blood lipid levels?
A . How to make brown fat stimulated.
B . How to improve blood sugar control.
C . How to get the extra calories burnt.
D . How to help people lose weight.
4 . What acts as the stimulus helping with the activation of brown fat?
A . The white cells.
B . The sugar.
C . The caffeine.
D . The calories.
★C1-4 ACAC
阅读下面短文,从每题所给的A、B、C、D四个选项中选出最佳答案.
Drinking coffee could activate the body's fat-fighting defenses, which is a discovery that could have a potential effect in the battle against obesity and diabetes. In a study, researchers said that coffee may help stimulate our brown fat reserves, also known as brown adipose tissue, which plays a key role in how quickly we can burn calories.
There are two forms of fat cells, brown cells and white cells, and each plays a different role in our body. While brown cells help generate heat, white cells are responsible for the storage of fat or energy — ready for release as needed. Levels of brown fat are known to be high in children but recent findings on the presence of brown fat in adults have restored hope to use them as targets to treat obesity.
"Brown fat works in a different way to other fat in your body and produces heat by burning sugar and fat, often in response to cold," said professor Michael Symonds. "Increasing its activity improves blood sugar control as well as improving blood lipid levels, and the extra calories burnt help with weight loss. However, until now, no one has found an acceptable way to stimulate its activity in humans."
The scientists started by testing out coffee on stem cells to see if it would stimulate brown fat. Once they found the right dose, they moved on to humans to see if the results were similar. "From our previous work, we knew that brown fat is mainly located in the neck region, so we were able to image someone straight after they had a drink to see if the brown fat got hotter," Symonds said.
"The results were positive and we now need to find out that caffeine as one of the ingredients in the coffee is acting as the stimulus or if there's another component helping with the activation of brown fat," Symonds said, "Once we have confirmed which component is responsible for this, it could potentially be used as part of a weight-management method or as part of regulation program to help prevent diabetes."
1 . What is the main idea of the passage?
A . Drinking coffee helps lose weight.
B . The obesity and diabetes are common.
C . The brown cells are harmful.
D . The best way to burn calories is swimming.
2 . Why do brown cells restore the hope of fighting obesity?
A . Because they help store fat.
B . Because they can release very soon.
C . Because they can help burn fat.
D . Because they make energy stored.
3 . What is the difficulty of improving blood lipid levels?
A . How to make brown fat stimulated.
B . How to improve blood sugar control.
C . How to get the extra calories burnt.
D . How to help people lose weight.
4 . What acts as the stimulus helping with the activation of brown fat?
A . The white cells.
B . The sugar.
C . The caffeine.
D . The calories.
★C1-4 ACAC
