Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?
Tap water that has been left to sit out slowly begins to acquire an off taste. Many people think that this is because of microorganisms(微生物). But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it's most likely safe to drink.
However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.
As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called bisphenol-A, or BPA, along with other things used to make plastic can leach(过滤) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer.Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.
1.Tap water begin to acquire an off taste because of .
A. BPA B. the glass
C. the microorganism D. carbon dioxide
2. According to Paragragh 2 , tap water that's been left sitting out for 12 hours____.
A. tastes better B. is still safe to drink
C. contains few microorganisms D. is most likely undrinkable
3. What should we do with plastic water bottles that have been left out in the sun or in the car?
A. Throw them away. B. Refill them with fresh water.
C. Use them after they cool down. D. Clean them and use them again.
4.Which of the following is true about BPA?
A. It is safe for people to use.
B. It is a kind of new material.
C. It can cause great harm to people.
D. It is the main material to make plastic.
高三英语阅读理解中等难度题
Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?
Tap water that has been left to sit out slowly begins to acquire an off taste. Many people think that this is because of microorganisms(微生物). But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it's most likely safe to drink.
However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.
As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called bisphenol-A, or BPA, along with other things used to make plastic can leach(过滤) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer.Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.
1.Tap water begin to acquire an off taste because of .
A. BPA B. the glass
C. the microorganism D. carbon dioxide
2. According to Paragragh 2 , tap water that's been left sitting out for 12 hours____.
A. tastes better B. is still safe to drink
C. contains few microorganisms D. is most likely undrinkable
3. What should we do with plastic water bottles that have been left out in the sun or in the car?
A. Throw them away. B. Refill them with fresh water.
C. Use them after they cool down. D. Clean them and use them again.
4.Which of the following is true about BPA?
A. It is safe for people to use.
B. It is a kind of new material.
C. It can cause great harm to people.
D. It is the main material to make plastic.
高三英语阅读理解中等难度题查看答案及解析
"Have you ever been out on a boat and felt it lifted up by a wave? Or have you jumped in the water and felt the rush of energy as waves came over you.?" asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh. "There is certainly a lot of energy in waves," he said. Scientists are working to use that energy to make electricity. Most waves are created when winds blow across the ocean. "The wind starts out by making little ripples (涟漪), but if they keep on blowing, those ripples get bigger and bigger and turn into waves," Taylor said. "Waves are one of nature's ways of picking up energy and then sending it off on a journey." When waves come toward the shore, people can set up dams to block the water and send it through a large wheel called a turbine (涡轮机). The turbine can then power an electrical generator to produce electricity.
"The resource is huge," said Janet Swain of the World Watch Institute. "We will never run out of wave power." Besides, wave energy does not create the same pollution as other energy sources, such as oil or coal. Oceans cover three-quarters of the Earth's surface---that would make wave power seem ideal for creating energy throughout the world, though there are some weak points yet to overcome.
Swain said that wave power still costs too much money. She also said that its effects on sea animals are still unknown. What is more, wave power could affect fishing and boat traffic. Traditional sources of energy like oil and gas may someday run out. "Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is rising rapidly throughout the world," Swain said. In the future when you turn on a light, an ocean wave could be providing the electricity!
1.The underlined phrase "picking up" is closest in meaning to ______.
A. starting again B. speeding up
C. improving D. gathering
2.We can make better use of wave energy if we ______.
A. shorten its journey to thousands of homes
B. build more small power stations on the oceans
C. reduce the cost of turning it into electric power
D. quicken the steps of producing electricity
3.It can be inferred that some day we might not worry about ______.
A. our power supply B. our boat traffic
C. air pollution D. our supply of sea fish
高三英语阅读理解中等难度题查看答案及解析
"Have you ever been out on a boat and felt it lifted up by a wave? Or have you jumped in the water and felt the rush of energy as waves came over you.'?" asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh. "There is certainly a lot of energy in waves," he said.
Scientists are working to use that energy to make electricity. Most waves are created when winds blow across the ocean. "The wind starts out by making little ripples (涟漪), but if they keep on blowing, those ripples get bigger and bigger and turn into waves," Taylor said. "Waves are one of nature's ways of picking up energy and then sending it off on a journey."
When waves come toward the shore, people can set up dams to block the water and send it through a large wheel called a turbine (涡轮机). The turbine can then power an electrical generator to produce electricity.
"The resource is huge," said Janet Swain of the Worldwatch Institute. "We will never run out of wave power." Besides, wave energy does not create the same pollution as other energy sources, such as oil or coal. Oceans cover three-quarters of the Earth's surface - that would make wave power seem ideal for creating energy throughout the world, though there are some weak points yet to overcome.
Swain said that wave power still costs too much money. She also said that its effects on sea animals are still unknown. What is more, wave power could affect fishing and boat traffic.
Traditional sources of energy like oil and gas may someday run out. "Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is rising rapidly throughout the world," Swain said. In the future when you turn on a light, an ocean wave could be providing the electricity!
1.The writer uses the two questions at the beginning of the passage to _______.
A. test the readers' knowledge about waves
B. draw the readers' attention to the topic
C. show Jamie Taylor's importance
D. invite the readers to answer them
2.The underlined phrase "picking up" (paragraph 2) is closest in meaning to _______.
A. starting again
B. speeding up
C. gathering
D. improving
3.We can make better use of wave energy if we _______.
A. shorten its journey to thousands of homes
B. build more small power stations on the oceans
C. reduce the cost of turning it into electric power
D. quicken the steps of producing electricity
4.It can be inferred that some day we might not worry about ________.
A. air pollution
B. our boat traffic
C. our power supply
D. our supply of sea fish
高三英语阅读理解中等难度题查看答案及解析
B
“Have you ever been out on a boat and felt it lifted up by a wave? Or have you jumped in the water and felt the rush of energy as waves came over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh. “There is certainly a lot of energy in waves,” he said. Scientists are working to use that energy to make electricity. Most waves are created when winds blow across the ocean. “The wind starts out by making little ripples(涟漪), but if they keep on blowing, those ripples get bigger and bigger and turn into waves,” Taylor said. “Waves are one of nature’s ways of picking up energy and then sending it off on a journey.” When waves come toward the shore, people can set up dams to block the water and send it through a large wheel called a turbine(涡轮机). The turbine can then power an electrical generator to produce electricity.
“The resource is huge,” said Janet Swain of the World Watch Institute. “We will never run out of wave power.” Besides, wave energy does not create the same pollution as other energy sources, such as oil or coal. Oceans cover three quarters of the Earth’s surface—that would make wave power seem ideal for creating energy throughout the world, though there are some weak points yet to overcome.
Swain said that wave power still costs too much money. She also said that its effects on sea animals are still unknown. What is more, wave power could affect fishing and boat traffic. Traditional sources of energy like oil and gas may someday run out. “Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is rising rapidly throughout the world,” Swain said. In the future when you turn on a light, an ocean wave could be providing the electricity!
1.The writer uses the two questions at the beginning of the passage to .
A. test the readers’ knowledge about waves
B. draw the readers’ attention to the topic
C. show Jamie Taylor’s importance
D. invite the readers to answer them
2.The underlined phrase “picking up” is closest in meaning to .
A. starting again B. speeding up
C. improving D. gathering
3.We can make better use of wave energy if we .
A. shorten its journey to thousands of homes
B. build more small power stations on the oceans
C. reduce the cost of turning it into electric power
D. quicken the steps of producing electricity
4.It can be inferred that someday we might not worry about .
A. our power supply
B. our boat traffic
C. air pollution
D. our supply of sea fish
高三英语阅读理解中等难度题查看答案及解析
Australians have been warned they face a life or death decision over their water—drink recycled sewage(污水)or die.
With the drought(干旱)continuing,the country is set to be forced to use purified(净化的)waste water for drinking.even though there is great opposition to the measure.
Queensland has become the first state to introduce tile policy after a warning from its premier.
“I think in the end,because of the drought,all of Australia is going to end up drinking recycled purified water.”said Peter Beattie.
“These are difficult decisions,but you either drink water or you die.There’s no choice.It’s liquid gold.It’s a matter of life and death.”
Beanie said Australia's second largest state would become the first to use recycled water for drinking.
Water is recycled in Britain and pans of northern Europe along with the US and Israel.
But Australians have never liked the idea.
To try to change the way Australians think,Prime Minister.John Howard and Environment Minister Malcolm Turnbull have adhered to Queensland’s move.
“I am very strongly for recycling and Mr.Beattie is right and I agree with him completely.”Howard said.
“Australian cities.all now facing water shortages because of the worst drought on record.must start to use recycled water.”added Turnbull.“All of our big cities have to widen tile range of water sources to include sources which are not dependent on rainfall.”
1.According to the passage,which of the following is TRUE?
A.Nobody disagrees to the idea of drinking recycled purified water
B.Australia’s second largest state has become tile first state to introduce the policy
C.No other countries but Australia decide to drink recycled water
D.The drought is tile worst one in tile droughts recorded in Australian history.
2.What call we learn from the last paragraph?
A.Australians have never like drinking purified waste water
B.Australians should develop more water sources to live through the hard time
C.Australians can’t depend upon rainwater,which is not suitable for drinking.
D.Australian government has no ability to solve the problem of water shortage
3.The underlined phrase“adhered to”in Paragraph 9 probably means
A.disliked B.gone against C.supported D.doubted
4.It can be inferred from what Premier Peter Beattie said that
A.he gives orders to drink purified waste water
B.It is painful for him to see his people drink recycled sewage
C.If the decision is made,people won’t survive the drought
D.It’s up to you to either make a life or death decision
高三英语阅读理解简单题查看答案及解析
Australians have been warned they face a life or death decision over their water—drink recycled sewage(污水)or die.
With the drought(干旱)continuing,the country is set to be forced to use purified(净化的)waste water for drinking.even though there is great opposition to the measure.
Queensland has become the first state to introduce tile policy after a warning from its premier.
“I think in the end,because of the drought,all of Australia is going to end up drinking recycled purified water.”said Peter Beattie.
“These are difficult decisions,but you either drink water or you die.There’s no choice.It’s liquid gold.It’s a matter of life and death.”
Beanie said Australia's second largest state would become the first to use recycled water for drinking.
Water is recycled in Britain and pans of northern Europe along with the US and Israel.
But Australians have never liked the idea.
To try to change the way Australians think,Prime Minister.John Howard and Environment Minister Malcolm Turnbull have adhered to Queensland’s move.
“I am very strongly for recycling and Mr.Beattie is right and I agree with him completely.”Howard said.
“Australian cities.all now facing water shortages because of the worst drought on record.must start to use recycled water.”added Turnbull.“All of our big cities have to widen tile range of water sources to include sources which are not dependent on rainfall.”
1.According to the passage,which of the following is TRUE?
A.Nobody disagrees to the idea of drinking recycled purified water
B.Australia’s second largest state has become tile first state to introduce the policy
C.No other countries but Australia decide to drink recycled water
D.The drought is tile worst one in tile droughts recorded in Australian history.
2.What call we learn from the last paragraph?
A.Australians have never like drinking purified waste water
B.Australians should develop more water sources to live through the hard time
C.Australians can’t depend upon rainwater,which is not suitable for drinking.
D.Australian government has no ability to solve the problem of water shortage
3.The underlined phrase“adhered to”in Paragraph 9 probably means
A.disliked B.gone against C.supported D.doubted
4.It can be inferred from what Premier Peter Beattie said that
A.he gives orders to drink purified waste water
B.It is painful for him to see his people drink recycled sewage
C.If the decision is made,people won’t survive the drought
D.It’s up to you to either make a life or death decision
高三英语阅读理解中等难度题查看答案及解析
Do you blank out or feel so nervous in exams that you have trouble writing answers to questions that you knew just last night? If so, you likely have a case of test anxiety.
But, don't be afraid. By recognizing the problem, you are taking the first step towards overcoming it.
Believe it or not, a touch of nervousness can sharpen your mind, allowing you to perform more quickly. This is because under stress, the body releases the hormone adrenaline (肾上腺素), which prepares it for something important that will happen. However, too much anxiety can result in sleeplessness, loss of appetite before tests, and poor performance. Some people might feel hot and tired. With great anger they often shout or complain for no reason.
If you worry a lot or are a perfectionist, you are more likely to have trouble with test anxiety. Those who have prepared poorly for a test or have had negative experiences taking tests may also experience test anxiety.
When you feel a storm of anxiety coming on, stop what you're doing and make your mind a blank. If possible, actually tell yourself to 'STOP!' This will get your mind off the stress. Then think of being at a place of comfort and let your body relax. As you continue the test, find questions you know the answers to and answer them first. This will help restore your confidence.
Important of all, talk to yourself using positive languages. Make it a habit to replace each negative thought with a logical reason. For example: "I've studied hard and I know the material, so I'm ready to do the best I can."
Another thing you can do is to learn to accept mistakes. In fact, they can be valuable learning opportunities.
Last but not least, start test preparation early — three to five days ahead of the quiz or test. After all, good study habits and skills — for example, time management and note-taking —will give you the feeling that you are in control.
1.What is probably the best title of the passage? ( No more than 10 words )
2. Who will more easily suffer from test anxiety according to the passage? ( No more than 10 words)
_______________________________________________________________________________
3. What does the underlined word “hot” in Paragraph3 probably mean? (No more than 3 words)
_______________________________________________________________________________
4.What makes you feel that you are in control of the test in the last paragraph?
(No more than 7 words)
_______________________________________________________________________________
5.Do you think that a touch of anxiety can have a positive effect? And why?
(No more than 20 words)
_______________________________________________________________________________
高三英语其他题简单题查看答案及解析
One night in 1905, Frank accidentally left his drink outside on the overnight. ________? It was absolutely delicious.
A. What for B. So what C. Guess what
高三英语单项填空中等难度题查看答案及解析
The days are gone________you can breathe fresh,unpolluted air or drink clean, unpolluted water in the countryside.
A.when B.that
C.where D.which
高三英语单项填空中等难度题查看答案及解析
You have been sitting on my hat and now it is badly out of ________ .
A. date B. shape C. order D. balance
高三英语单项填空简单题查看答案及解析