Every time you use a tea bag, you could be absorbing billions of microplastic and nanoplastic particles (纳米塑料颗粒). That's the conclusion of researchers at McGill University in Montreal.
The research centred on four different types of tea bags, of the kind recently preferred by some premium (优质的) brands. Having been emptied of the tea itself, the bags were placed in water heated to 95℃.
Researchers were surprised to find each bag released around 11.6 billion microplastics and a further 3.1 billion even smaller nanoplastics. These levels were, says the report, “thousands of times higher than plastic amounts previously reported in other foods.”
The researchers believe that the tea bags send so many microplastics because they are heated close to boiling point. And the researchers exposed water fleas (水蚤) to water containing varying concentrations of microplatics. While the animals did not die, they did display some abnormalities (畸形) that could suggest the microplastics were having a toxic (毒的) effect on them.
“To date, the health effects of consuming microplastics to humans are still unknown, while the effects observed in the present study and in other animals gave an early warning,” the researchers conclude in their study. “One of the main potential human exposure pathways of microplastics is likely via ingestion, and particle uptake may occur in the digestive tract. Once inside the digestive tract, cellular uptake (细胞吞噬) and subcellular translocation (亚细胞移位) or localization of the ingested particles may occur.”
1.What can we learn from paragraph 1?
A.Drinking tea is unhealthy for you.
B.Using tea bags probably takes in plastic grains.
C.People should often change the tea bags.
D.A tea bag is made up of microplastics and nanoplastic particles.
2.What do we know about the report in the passage?
A.The hot water can reduce more plastic particles.
B.The tea bags contain higher amount of plastics than everything.
C.The plastic particles exist in many other foods too.
D.The food industry has been greatly polluted now.
3.Why did the water fleas display some abnormalities?
A.They were poisoned by plastics.
B.They were not used to being exposed to hot water.
C.The water was heated close to boiling point.
D.They were put into different teas.
4.What's the purpose of the passage?
A.To introduce the study of microplastic and nanoplastic.
B.To tell us the contents of tea bags.
C.To explain the latest findings in plastic.
D.To inform us of the potential danger of using tea bags.
高二英语阅读理解中等难度题
Every time you use a tea bag, you could be absorbing billions of microplastic and nanoplastic particles (纳米塑料颗粒). That's the conclusion of researchers at McGill University in Montreal.
The research centred on four different types of tea bags, of the kind recently preferred by some premium (优质的) brands. Having been emptied of the tea itself, the bags were placed in water heated to 95℃.
Researchers were surprised to find each bag released around 11.6 billion microplastics and a further 3.1 billion even smaller nanoplastics. These levels were, says the report, “thousands of times higher than plastic amounts previously reported in other foods.”
The researchers believe that the tea bags send so many microplastics because they are heated close to boiling point. And the researchers exposed water fleas (水蚤) to water containing varying concentrations of microplatics. While the animals did not die, they did display some abnormalities (畸形) that could suggest the microplastics were having a toxic (毒的) effect on them.
“To date, the health effects of consuming microplastics to humans are still unknown, while the effects observed in the present study and in other animals gave an early warning,” the researchers conclude in their study. “One of the main potential human exposure pathways of microplastics is likely via ingestion, and particle uptake may occur in the digestive tract. Once inside the digestive tract, cellular uptake (细胞吞噬) and subcellular translocation (亚细胞移位) or localization of the ingested particles may occur.”
1.What can we learn from paragraph 1?
A.Drinking tea is unhealthy for you.
B.Using tea bags probably takes in plastic grains.
C.People should often change the tea bags.
D.A tea bag is made up of microplastics and nanoplastic particles.
2.What do we know about the report in the passage?
A.The hot water can reduce more plastic particles.
B.The tea bags contain higher amount of plastics than everything.
C.The plastic particles exist in many other foods too.
D.The food industry has been greatly polluted now.
3.Why did the water fleas display some abnormalities?
A.They were poisoned by plastics.
B.They were not used to being exposed to hot water.
C.The water was heated close to boiling point.
D.They were put into different teas.
4.What's the purpose of the passage?
A.To introduce the study of microplastic and nanoplastic.
B.To tell us the contents of tea bags.
C.To explain the latest findings in plastic.
D.To inform us of the potential danger of using tea bags.
高二英语阅读理解中等难度题查看答案及解析
— Can you keep an eye on my bag, Tom? I just want to use the bathroom.
—____. It will be safe with me.
A．Go ahead B．I think so C．Not at all D．You’re welcome
高二英语单项填空中等难度题查看答案及解析
Every student has his own style of studying and it's up to you to use the available resources to be as effective and productive as possible.Here are some tips on how to teach yourself to study effectively.
●1.When determining the best approach,you need to assess your personality.Some people can read for hours while others can't sit still through more than one chapter.Find your pace,improve it and work around your strengths and weaknesses.It's up to you whether to join a study group or learn by yourself.
●Set a goal.2.It'll not only help you keep focused and stay on track but also help you organize your time and activities.
●Learn over time.3.If you don't know or understand the lesson from the start,you won't get it the night before your big test.It's best to study smaller loads of information repeated over a period of time.
●Set a realistic and reasonable schedule.4.Create a routine schedule for your studying time.Strictly follow this schedule so as to develop an effective studying session.
●Have time to rest.It's necessary to have enough time to rest in order to regain all the energy used up by the body from all the studying.5.Communicate with other people and participate in recreational activities to help you relax and refresh your mind.
A.Know yourself.
B.Have good study habits.
C.It's impossible to learn a lot of things in a short time.
D.Try to discover the type of reading that best suits you.
E.Allocate your time between studying and other activities.
F.Your mind won't be as sharp if you don't have ample sleep.
G.You need to determine what you want to achieve in a given subject.
高二英语七选五中等难度题查看答案及解析
Despite being used by 1.34 billion people each year, traveling on the Tube in London can actually be quite lonely. An unwritten rule encouraging reticence (沉默寡言), mixed with classic British reserve, means that even though you’re packed into enclosed space with hundreds of other people, the morning trip can leave you feeling somewhat lonely.
One London resident, however, is trying to change this. “You get on the Tube and it’s completely silent and it’s strange,” says Jonathan Dunne, an American living in London, who has started a campaign of giving out badges (徽章) with the slogan “Tube chat?” last month, encouraging travelers in London to get to talk to one another. “I handed out 500 badges during rush hour in a city of 8 million, expecting most of them to be thrown away, but after about 24 hours it completely snowballed,” he says. Dunne and his “Tube chat” campaign have been reported by media across the world, seeing TV interviews in Sweden, Brazil and the UK, as well as countless website, newspaper and magazine appearances.
Although Dunne says he’s received mostly positive responses, there are always exceptions.
Londoner Brian Wilson responded with a campaign of his own, handing out 500 badges with the words “Don’t even think about it” on them. “I can’t stand the idea of having to talk to strangers on the Tube on my way to work,” he said.
Michael Robinson, 24, a student from London, agrees. “Being on the Tube is the only peace and quiet some people get on their journeys to and from work. It doesn’t need to be spoiled by people coming up and chatting to you,” he says.
“People assume that I just walk up and talk to strangers, which I don’t, but it’s been a great way to meet people you would never have normally spoken to,” Dunne says. So if you ever end up using public transport in London, why not say hello to the person next to you? Just make sure to check for a badge first.
1.What does the underlined word “reserve” mean?
A.tidiness B.gentleness
C.silence D.vividness
2.What can the badge with “Tube Chat?” be seen as?
A.A request for keeping silent.
B.A special way of greeting someone.
C.A signal of avoiding being disturbed.
D.An encouragement to start a conversation.
3.How is Dunne’s campaign getting along?
A.Most passengers have refused to accept it.
B.Wilson has made great efforts to promote it.
C.It has been covered in many countries.
D.It has become a worldwide campaign.
4.Why does the author mention Brian and Michael?
A.To stress the importance of communication.
B.To show not everyone agrees with Dunne’s idea.
C.To prove Londoners are speechless on the Tube.
D.To state the disadvantages of chatting with strangers.
5.What’s the best title for the passage?
A.Please mind the silence on the Tube!
B.Time to change your way to take the subway!
C.What makes people feel lonely on the Tube?
D.Why was the “Tube Chat?” campaign not a success?
高二英语阅读理解中等难度题查看答案及解析
Despite being used by 1.34 billion people each year, traveling on the Tube in London can actually be quite lonely.
One citizen, however, is trying to change this. “You get on the Tube and it’s completely silent and it’s weird(怪异的),” says Jonathan Dunne, who has started a worldwide dialogue after giving out badges (徽章) with the words “Tube chat?” last month, encouraging passengers in London to get talking to one another. “I handed out 500 badges during rush hour in a city of 8 million, expecting most of them to be thrown away, but after about 24 hours it completely snowballed,” he says. Dunne and his “Tube chat” campaign have since been reported by media across the world, seeing TV interviews in Sweden, Brazil and the UK, as well as countless website, newspaper and magazine appearances.
Although Dunne says he’s received mostly positive feedback, not everyone agrees with his idea. Londoner Brian Wilson responded with a campaign of his own, handing out 500 badges with the words “Don’t even think about it” on them. Michael Robinson, 24, a student from London, agrees. “Being on the Tube is the only peace and quiet some people get on their journeys to and from work. It doesn’t need to be spoiled by people coming up and chatting to you,” he says.
“People assume that I just walk up and talk to strangers, which I don’t, but it’s been a great way to meet people you would never have normally spoken to,” Dunne says.
So if you ever end up using public transport in the West, why not say hello to the person next to you? Just make sure to check for a badge first.
1.In what way did Dunne encourage London passengers to talk with each other?
A. By putting up posters on the tube.
B. By offering passengers special badges.
C. By advocating his idea on the media.
D. By starting a dialogue with passengers.
2.How is Dunne’s campaign getting along?
A. Most passengers have refused to accept it.
B. It has become a worldwide campaign.
C. It has caught international attention.
D. Wilson has made great efforts to promote it.
3.According to Michael Robinson, what should tube passengers do?
A. Hand in their feedback in time.
B. Walk up and talk to strangers.
C. Stop using public transport.
D. Enjoy the peace quietly.
4.What can be the best title for the text?
A. Tube Chat or Not
B. Lonely Travel in the London Tube
C. Silence on the Tube
D. Tube Passengers Wearing Badges
高二英语阅读理解中等难度题查看答案及解析
You will find what great benefit the computer you own can be _____ each time you use it to help you work.
A．for B．at C．of D．on
高二英语单项填空中等难度题查看答案及解析
Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult.
The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be wil1ing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writing easier. Sometimes the subject that you think is going to be uninteresting will be exciting when you begin to work at it and understand it more clearly. Learning things can be fun if you are willing to work with them.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions(中断); have everything ready before you sit down to study, a dictionary, paper, a pen and books; be sure you understand what you should learn before you start; read carefully and pay special attention to the most important things; when memorizing, first find out the main parts and then recite the whole thing; check your homework after you finish it; never forget the importance of review and preview.
Don’t try to spend a lot of time researching learning methods. There are many students who know many good learning methods but don’t study well. They forget that the most useful learning method is to study hard.
1. The main goal of the article is______
A. to prove that learning is not difficult
B. to make the readers be interested in study
C. to tell the importance of self teaching
D. to tell the students how to study well
2. The first thing to remember in studying is that
A. you must like the subject
B. you must follow the teacher
C. you must enjoy learning
D. you must study hard
3. We learn things because______
A. our parents want us to learn
B. every student learns at school
C. we may use these things in the future
D. we like the subjects
4. Which of the following is NOT the advice given in the article?
A. To put a pen, paper and books beside you before study.
B. To study at any possible time and place.
C. To review and preview
D. To pay attention to the most important things.
5. Which of the following statements is true?
A. The more learning methods we have, the better we will study.
B. Finding the best learning method is the most important in learning.
C. If you don’t work hard, though you have a good learning method, you can’t be good at study.
D. Once we have mastered a good learning method, we can improve our study greatly.
高二英语阅读理解简单题查看答案及解析
Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult.
The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be willing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writing easier. Sometimes the subject that you think is going to be uninteresting will be exciting when you begin to work at it and understand it more clearly. Learning things can be fun if you are willing to work with them.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions; have everything ready before you sit down to study, a dictionary, paper, a pen and books; be sure you understand what you should learn before you start; read carefully and pay special attention to the most important things; when memorizing, first find out the main parts and then recite the whole thing; check your homework after you finish it; never forget the importance of review and preview.
Don’t try to spend a lot of time researching learning methods. There are many students who know many good learning methods but don’t study well. They forget that the most useful learning method is to study hard.
1.The main purpose of the article is______.
A. to prove that learning is not difficult
B. to make the readers be interested in study
C. to tell the importance of self teaching
D. to tell the students how to study well
2.The first thing to remember in studying is that ______.
A. you must like the subject
B. you must follow the teacher
C. you must enjoy learning
D. you must study hard
3.The following advice is given in the article EXCEPT______.
A. To put a pen, paper and books beside you before study.
B. To study at any possible time and place.
C. To review and preview
D. To pay attention to the most important things.
4.Among the following statements, ______is true.
A. The more learning methods we have, the better we will study.
B. Finding the best learning method is the most important in learning.
C. Knowing good methods, you can’t be good at study without working hard.
D. Once we have mastered a good learning method, we can improve our study greatly.
5.From the passage, we can conclude that ______.
A. No pains, no gains B. Better late than never
C. Study comes first D. Good methods, good results.
高二英语阅读理解困难题查看答案及解析
Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult.
The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be willing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writing easier. Sometimes subject that you think is going to be uninteresting will be exciting when you begin to work at it and understand it more clearly. Learning things can be fun if you are willing to work with them.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions; have everything ready before you sit down to study, a dictionary, paper, a pen and books; be sure you understand what you should learn before you start; read carefully and pay special attention to the most important things; when memorizing, first find out the main parts and then recite the whole thing; check your homework after you finish it; never forget the importance of review and preview.
1.The main purpose of the article is____________
A. to prove that learning is not difficult
B. to make the readers be interested in study
C. to tell the importance of self teaching
D. to tell the students how to study well
2.The first thing to remember in studying is that____________
A. you must like the subject
B. you must follow the teacher
C. you must enjoy learning
D. you must study hard
3.We learn things because______________
A. our parents want us to learn
B. every student learns at school
C. we may use them in the future
D. we like the subjects
4.Which of the following is NOT the advice given in the article?
A. To put a pen, paper and books beside you before study.
B. To study at any possible time and place.
C. To review and preview.
D. To pay attention to the most important things.
高二英语阅读理解中等难度题查看答案及解析
Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult.
The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be wil1ing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writing easier. Sometimes the subject that you think is going to be uninteresting will be exciting when you begin to work at it and understand it more clearly. Learning things can be fun if you are willing to work with them.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions(中断); have everything ready before you sit down to study, a dictionary, paper, a pen and books; be sure you understand what you should learn before you start; read carefully and pay special attention to the most important things; when memorizing, first find out the main parts and then recite the whole thing; check your homework after you finish it; never forget the importance of review and preview.
Don’t try to spend a lot of time researching learning methods. There are many students who know many good learning methods but don’t study well. They forget that the most useful learning method is to study hard.
1.The main goal of the article is .
A. to prove that learning is not difficult
B. to make the readers be interested in study
C. to tell the importance of self teaching
D. to tell the students how to study well
2.The first thing to remember in studying is that .
A. you must like the subject B. you must follow the teacher
C. you must enjoy learning D. you must study hard
3.We learn things because .
A. our parents want us to learn B. every student learns at school
C. we may use these things in the future D. we like the subjects
4.The following advice is given in the article EXCEPT .
A. To put a pen, paper and books beside you before study.
B. To study at any possible time and place.
C. To review and preview
D. To pay attention to the most important things.
5.Among the following statements, which is true?
A. The more learning methods we have, the better we will study.
B. Finding the best learning method is the most important in learning.
C. If you don’t work hard, though you have a good learning method, you can’t be good at study.
D. Once we have mastered a good learning method, we can improve our study greatly.
高二英语阅读理解中等难度题查看答案及解析