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.
高一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(获得) off taste. Many people think that this is because of microorganisms. 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(假设) 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. carbon dioxide
C. the glass D. the microorganism
2.According to Paragragh 2 , tap water that's been left sitting out for 12 hours____.
A. is still safe to drink B. tastes better
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. Clean them and use them again.
C. Use them after they cool down.
D. Refill them with fresh water.
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.
高一英语阅读理解中等难度题查看答案及解析
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(获得) off taste. Many people think that this is because of microorganisms. 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(假设) 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 biphenyl-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. carbon dioxide B. BPA
C. the glass D. the microorganism
2.According to Paragraph 2, tap water that's been left sitting out for 12 hours____.
A. contains few microorganisms B. is still safe to drink
C. tastes better 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. Use them after they cool down.
B. Clean them and use them again.
C. Throw them away.
D. Refill them with fresh water
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 is the main material to make plastic.
D. It can cause great harm to people.
高一英语阅读理解中等难度题查看答案及解析
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.
高一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 the 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.”
Beattie said Australia’s second largest state would become the first to use recycled water for drinking.
Water is recycled in Britain and parts 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 the range of water sources to include sources which are not dependent on rainfall.”
1.What is the text mainly about?
A.Australians face the choice of life and death. |
B.Premier Beattie is worried about his people’s health. |
C.We should avoid drinking recycled water to keep healthy. |
D.Continuing drought forces Australians to drink recycled sewage. |
2.What can 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 people drink recycled sewage |
C.If the decision is made, people won’t survive the drought |
D.It’s totally up to you to either make a life or death decision |
高一英语阅读理解中等难度题查看答案及解析
Do you blank out, freeze up 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 panic. 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(食欲) before tests, and poor performances. Some people might feel shaky, hot, or even sick.
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 are 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.
Talk to yourself using positive language. 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 your are in control.
1.The first step to overcome nervousness is___ .
A. stopping what you are doing, and make your mind a blank.
B. getting aware of your problem that you are always nervous
C. releasing a kind of body liquid. D. making full preparations
2.___ are more likely to feel very nervous in tests.
A. People who feel a touch of nervousness in tests.
B. People who haven’t prepared very well.
C. People who require that everything must be perfect.
D. People who have recognized their problems.
3. According to the passage, which statement is TRUE?
A. Those who have ever failed in tests must feel anxious.
B. A touch of nervousness is a good thing.
C. You should answer the questions on the paper one by one.
D. Full preparation is not as important as nervousness controlling.
高一英语阅读理解中等难度题查看答案及解析
If you know a bottle of water has been recycled from urine (尿液), will you drink it? Chinese astronauts have done so.
China National Space Administration(CNSA)says it uses a high-tech machine to recycle wastewater. The machine will recycle everything from sweat, the water for washing hands, shower water, water used for brushing teeth, and even urine, to make drinking water.
It saves CNSA millions of YMB each year. At present, each CNSA astronaut uses about 4.4 liters of water every day. It costs about ¥150 million a year to transport water up to space.
The urine recycling system is needed for astronaut stations because it won’t have to ship up as much water to the station by space shuttles or rockets. Besides, it’s important as the space station is about to expand from three people living on board to more.
The recycling system was brought up to the space station last August by space shuttles. The three-man crew stood holding their drinks and congratulated engineers in CNSA center that worked on the system.
“This is something that has been the stuff of science work,” astronaut Chen Dong said before taking a small mouthful. “The taste is well worth trying.”
Is the water clean? Scientists say the wastewater will go through a very complicated (复杂的) process. For example, different chemicals will be put in the wastewater; the water will be heated to 130C to get rid of bacteria. The recycled water is thousands of times better than the water from a city tap, scientists say.
1.What can the water recycled from urine be used for?
A.Drinking.
B.Washing hands.
C.Brushing teeth.
D.Taking a bath.
2.Why is a high-tech machine to recycle wastewater needed on space stations?
A.To get astronauts to keep healthy.
B.To help astronauts do experiments.
C.To provide astronauts a basic living condition.
D.To save the cost of transporting water up to space.
3.Scientists get rid of bacteria in the wastewater by ________.
A.recycling
B.freezing
C.heating
D.collecting
4.What does the text mainly talk about?
A.Water recycled from urine tastes good.
B.How to recycle the wastewater on space.
C.New technology is used in the Chinese space station.
D.CNSA uses a high-tech machine to recycle wastewater for astronaut stations.
高一英语阅读理解中等难度题查看答案及解析
Teens are now less likely to do part time jobs,drink alcohol or go out without their parents than their counterpart 10 or 20 years ago.This generation of teens is delaying the responsibilities and pleasures of adulthood.Some people think that today's teens are more virtuous(品行端正的) and responsible.Others have suggested that today's teens aren't working because they are simply lazy.
To figure out what's really going on,we should look at these trends with"life history theory" taken into consideration.A"fast life method"was the more common parenting approach in the mid-20th century,when fewer labor-saving devices were available and the average woman had four children.The parents needed to focus on day to day survival.As a result,kids needed to care for themselves sooner.A"slow life method"on the other hand is more common in times and places where families have fewer children and spend more time on each child's growth and development.When the average family has two children,preparing for college can begin as early as primary schools.The two methods are adaptations to a particular cultural background,so each isn't naturally"good"or"bad".
Delaying exposure to alcohol,then,could make young adults less prepared to deal with drinking in college.One study found teens who rapidly increased there binge-drinking(酗酒) were more at risk of alcohol dependence than those who learned to drink over a longer period of time.The same might be true of teens who don't work,drive or go out much in high school. College administrators describe students who can't do anything without calling their parents. Employers worry that more young employees lack the ability to work independently.
However,the"slow-life method"is also likely beneficial as teens are spending more time developing socially and emotionally before they drive,drink alcohol and work for pay.The key is to make sure that teens eventually get the opportunity to develop the skills they will need as adults: independence,along with social and decision making skills.For parents,this might mean pushing their teenagers out of the house more.
1.According to the text,teens in the past were more____.
A.reliable B.outgoing
C.intelligent D.independent
2.What plays a vital role in the trend of teens growing up more slowly?
A.Social standard
B.Cultural changes
C.Educational development.
D.Methods of education
3.What does the author advise parents to do?
A.Spend less time in accompanying their children.
B..Force their children to leave home at an early age.
C.Encourage their children to take part in social activities.
D.Help their children to get to adulthood as soon as possible.
4.Which of the following can be the best tile for the text?
A.How teens develop skills they need in future
B.Teens take no responsibility for what they do
C.Why today's teens aren't in any hurry to grow up
D.Nowadays teens can't make decisions by themselves
高一英语阅读理解困难题查看答案及解析
Sometimes, you do not finish drinking your glass of water before you go to bed. 1.
But have you ever wondered if it is still safe to drink?
“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.
2. That’s because after about 12 hours, the carbon dioxide (二氧化碳) in the air reacts(反应)with the water in your glass, slightly lowering its pH level.
Also, there might be more microorganisms (微生物) in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stay on your glass. 3. But as long as you clean your glasses very often, this will not be a problem.
In countries like the US and UK, people often drink water directly from the tap (水龙头).4. Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine (氯) in the water and bacteria (细菌) start to grow. You’d better not drink the water otherwise you may get sick.
5. Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.
A.What about plastic water bottles?
B.They can make you get sick more easily.
C.Is it safe for you to drink the water later?
D.But you may find that it tastes strange.
E.Some people prefer to drink water from rivers.
F.You might want to drink it the next morning.
G.This is OK—however, tap water cannot be stored for a long time.
高一英语七选五中等难度题查看答案及解析
They say that _______ a lot of water is good for you.
A. drink B. having drunk C. drinking D. drank
高一英语单项填空简单题查看答案及解析
If you have ever been left wondering why your emails are riddled(充斥着) with grammatical errors, or why you can never quite find the right phrase, it may be because you are typing with both hands.
Our vocabulary becomes richer and our writing style becomes more fluent when we type using just one hand, scientists have found. "Typing can be too fluent or too fast, and it can actually weaken the writing process," said Srdan Medimorec, the lead author of the study conducted at the department of psychology at the University of Waterloo, Canada. "It seems that what we write is a product of the interaction(互动) between our thoughts and the tools we use to express them."
Using text-analysis software, researchers asked 103 university students to write essays under different conditions, using one hand to type and using both hands to type. The software was used to analyze(分析) elements of the essays, such as range of vocabulary, sentence complexity and the cohesion(衔接) of the writing.
Researchers found that participants' vocabulary became more advanced when they typed with one hand rather than two. The research team said that by slowing our writing down, typing one-handed allows more time for an internal (内在的) word search, resulting in a larger variety of words.
In contrast, fast typists might just write the first word that comes to mind. However, it is important not to slow typing down too much. Those who typed essays one-handed in the current study slowed down to about the speed of handwriting.
This is the first study to show that changing people’s typing can make their writing get better. The researchers suggested that the speed of writing could affect writing quality regardless of the tools used, whether they are computers, or pen and paper, although further research would be required to prove that idea.
1. The underlined “it” in the second paragraph refers to______.
A. the writing style
B. typing too fast or fluently
C. the vocabulary
D. which hand to use for typing
2. Which of the following statements is true according to the passage?
A. The study was carried out in 103 universities.
B. The researchers drew the conclusion by interviewing students about their feelings in the writing process.
C. The typing speed should be as slow as possible.
D. There is no previous study related to the topic before.
3. What is the author’s attitude to the research according to the passage?
A. objective B. doubtful
C. critical D. supportive
4.Which is the best title of the passage?
A. How to become a good writer?
B. Typing with both hands could make you a worse writer.
C. Slower typing, fewer mistakes.
D. Elements weakening the writing process
高一英语阅读理解中等难度题查看答案及解析