Microplastics are everywhere in our environment. It's hardly surprising that the tiny fragments have also been found in humans. A new study shows that Americans are consuming as many as 121,000 particles each year.
Measuring 50 to 500 microns in length, microplastics come from a variety of sources, including large plastics that break down into smaller and smaller pieces. Therefore, much remains unknown about the common existence of these materials within the human body, as well as their impact on human health.
Hoping to fill in some of these gaps, a research team led by Kieran Cox, a PhD candidate at the University of Victoria, looked at 26 papers assessing the amount of microplastics in commonly consumed food items, among which are seafood, sugars, salts, honey, alcohol and water. The team also evaluated the potential consumption of microplastics through inhalation （吸入）using previously reported data on microplastic concentrations in the air and the Environmental Protection Agency's reported respiration rates. Based on these data, the researchers calculated that our annual consumption of microplastics via food and drink ranges from 39,000 to 52,000 particles. When microplastics taken in through inhalation are taken into account, the range jumps to between 74,000 and 121,000 particles per year.
The authors of the study found that people who drink exclusively from plastic water bottles absorb an additional 90,000 microplastics each year, compared to 4,000 among those who only consume tap water. "This shows that small decisions, over the course of a year, really matter and have an impact." Cox says. The new study, according to its authors, was the first to investigate "the accumulative human exposure" to microplastics. But in all likelihood, the research tells only a small part of the entire story. Collectively, the food and drink that the researchers analyzed represent 15 percent of Americans' caloric intake. The team could not account for food groups like fruits, vegetables and grains because there simply is not enough data on their microplastic content.
For those worried about microplastic consumption, cutting down bottled water is a good place to start. But to the heart of the problem, we have to stop producing and using so much plastic.
1.What makes it difficult to know microplastics commonly exist in the human body?
A.The quality. B.The quantity.
C.The shape. D.The size.
2.How did Kieran Cox's team calculate the potential consumption of microplastics?
A.By studying papers. B.By comparing the impacts.
C.By analyzing the data. D.By conducting experiments.
3.Which of the following is true according to the text?
A.Drinking less plastic bottled water helps to take in fewer microplastics.
B.The study is among the earliest to investigate human exposure to microplastics.
C.Cox's team gained comprehensive information of microplastics taken in by humans.
D.People consume 74,000 to 121,000 particles of microplastics per year from food and drink.
4.What is the best title for the text?
A.The Potential Problems of Microplastics
B.Microplastics Coming From Various Sources
C.Microplastics Found Within Human Bodies
D.The Impact of Microplastics on Human Health
高三英语阅读理解困难题
Microplastics are everywhere in our environment. It's hardly surprising that the tiny fragments have also been found in humans. A new study shows that Americans are consuming as many as 121,000 particles each year.
Measuring 50 to 500 microns in length, microplastics come from a variety of sources, including large plastics that break down into smaller and smaller pieces. Therefore, much remains unknown about the common existence of these materials within the human body, as well as their impact on human health.
Hoping to fill in some of these gaps, a research team led by Kieran Cox, a PhD candidate at the University of Victoria, looked at 26 papers assessing the amount of microplastics in commonly consumed food items, among which are seafood, sugars, salts, honey, alcohol and water. The team also evaluated the potential consumption of microplastics through inhalation （吸入）using previously reported data on microplastic concentrations in the air and the Environmental Protection Agency's reported respiration rates. Based on these data, the researchers calculated that our annual consumption of microplastics via food and drink ranges from 39,000 to 52,000 particles. When microplastics taken in through inhalation are taken into account, the range jumps to between 74,000 and 121,000 particles per year.
The authors of the study found that people who drink exclusively from plastic water bottles absorb an additional 90,000 microplastics each year, compared to 4,000 among those who only consume tap water. "This shows that small decisions, over the course of a year, really matter and have an impact." Cox says. The new study, according to its authors, was the first to investigate "the accumulative human exposure" to microplastics. But in all likelihood, the research tells only a small part of the entire story. Collectively, the food and drink that the researchers analyzed represent 15 percent of Americans' caloric intake. The team could not account for food groups like fruits, vegetables and grains because there simply is not enough data on their microplastic content.
For those worried about microplastic consumption, cutting down bottled water is a good place to start. But to the heart of the problem, we have to stop producing and using so much plastic.
1.What makes it difficult to know microplastics commonly exist in the human body?
A.The quality. B.The quantity.
C.The shape. D.The size.
2.How did Kieran Cox's team calculate the potential consumption of microplastics?
A.By studying papers. B.By comparing the impacts.
C.By analyzing the data. D.By conducting experiments.
3.Which of the following is true according to the text?
A.Drinking less plastic bottled water helps to take in fewer microplastics.
B.The study is among the earliest to investigate human exposure to microplastics.
C.Cox's team gained comprehensive information of microplastics taken in by humans.
D.People consume 74,000 to 121,000 particles of microplastics per year from food and drink.
4.What is the best title for the text?
A.The Potential Problems of Microplastics
B.Microplastics Coming From Various Sources
C.Microplastics Found Within Human Bodies
D.The Impact of Microplastics on Human Health
高三英语阅读理解困难题查看答案及解析
Worry problems are everywhere in our daily life．How to solve them? The answer is that we must equip ourselves to deal with different kinds of worries by learning the three basic steps of problem analysis．The three steps are:
Get the facts
Why is it so important to get the facts? Unless you have the facts, you can’t possibly attempt to solve your problem intelligently．Without the facts, all you can do is wondering around in confusion．It is not an easy job to get facts．When you are worried, your emotions are riding high．__1.__.
When trying to get the facts, you can pretend that you are collecting this information not for yourself but for some other person．__2.__You can also pretend that you are a lawyer preparing to agree．Try to get all the facts both on your side and the other side of the case．You will generally find the truth lies somewhere in between.
__3.__
Whenever you are worried, write down the questions that make you worry．And write out all the various steps you could take and then the probable consequences of each step．For example, what am I worrying about? What can I do about it? Here is what I’m going to do about it．After carefully weighing all the facts, you can calmly come to a decision.
Act on that decision.
__4.__ How can you break the worry habit before it breaks you? Crowd worry out of your mind by keeping busy．Plenty of action is one of the best ways to cure worry．__5.__ If you know a situation is beyond your power, say to yourself: “ It is so; it can’t be otherwise.” Don’t permit little things to ruin your happiness．Try to cultivate a mental attitude that will bring you peace and happiness.
A． Accept what can’t be avoided.
B． Analyze the facts.
C． There comes a time when you must decide and never look back.
D． But here are two ideas that can help you see the facts in a clear and objective way.
E． Unless you take your action, all your face-finding and analysis is a sheer waste of energy.
F． Decide how much anxiety a thing may be worth.
G． This will help you to take a cold and fair view of the evidence.
高三英语七选五中等难度题查看答案及解析
Worry problems are everywhere in our daily life. How to solve them? The answer is that we must equip ourselves to deal with different kinds of worries by learning the three basic steps of problem analysis. The three steps are:
Get the facts
Why is it so important to get the facts? Unless you have the facts, you can’t possibly attempt to solve your problem intelligently. Without the facts, all you can do is wondering around in confusion. It is not an easy job to get facts. When you are worried, your emotions are riding high. 1. .
When trying to get the facts, you can pretend that you are collecting this information not for yourself but for some other person. 2. You can also pretend that you are a lawyer preparing to agree. Try to get all the facts both on your side and the other side of the case. You will generally find the truth lies somewhere in between.
3.
Whenever you are worried, write down the questions that make you worry. And write out all the various steps you could take and then the probable consequences of each step. For example, what am I worrying about? What can I do about it? Here is what I’m going to do about it. After carefully weighing all the facts, you can calmly come to a decision.
Act on that decision.
4. How can you break the worry habit before it breaks you? Crowd worry out of your mind by keeping busy. Plenty of action is one of the best ways to cure worry. 5. If you know a situation is beyond your power, say to yourself: “ It is so; it can’t be otherwise.” Don’t permit little things to ruin your happiness. Try to cultivate a mental attitude that will bring you peace and happiness.
A. Accept what can’t be avoided.
B. Analyze the facts.
C. There comes a time when you must decide and never look back.
D. But here are two ideas that can help you see the facts in a clear and objective way.
E. Unless you take your action, all your face-finding and analysis is a sheer waste of energy.
F. Decide how much anxiety a thing may be worth.
G. This will help you to take a cold and fair view of the evidence.
高三英语信息匹配中等难度题查看答案及解析
Food production does great harm to our environment.There are many procedures involved in the manufacture of food that result in greenhouse gases and other pollutants.Some procedures require the consumption of large amounts of fossil fuels,such as the transportation and storage of food products.Other factors that cause great damage to our environment include the overuse of fresh water.
The production of beef is more damaging to the environment than that of any other food we consume,Raising large numbers of cattle requires the production of large amounts of food for the animals.It’s estimated that producing one pound of beef requires seven pounds of feed.
Land use is also a problem.If the cattle are free-range cattle,large areas of land are required for them to live on.This has led to disastrous forest cutting and the loss of rare plants and animal species,particularly in tropical rain forests in Central and South America.
Another problem specific to beef production is methane emissions (甲烷排放).Although many people are aware of the damaging effects of carbon dioxide,they don’t realize methane’s global warming potential is 25 times worse,making it a more dire problem.
Unfortunately,beef consumption is growing rapidly.This is the result of simple supply and demand factors.Specifically,there are two main causes of demand that are encouraging the production of more supply.First,the increase in the world population means there are more people to consume meat.The second factor is socioeconomic advancement.As citizens in developing nations become financially stable,they can afford to buy more meat.
Therefore,one way to reduce the greenhouse gas emissions is for people around the world to significantly cut down on the amount of beef they eat.
1.Which of the following is TRUE?
A. Raising free-range cattle is eco-friendly.
B. People cut down trees for animal habitats.
C. Producing beef can damage the environment.
D. Carbon dioxide causes far more harm than methane.
2.The underlined word “dire” in Para.4 means .
A. urgent B. common
C. typical D. avoidable
3.Beef production is growing rapidly because .
A. more people are in demand of beef
B. developing countries raise more cattle
C. more land is available to raise cattle
D. the cost of raising cattle is relatively low
4.The author writes this article to .
A. describe the booming of the beef production
B. emphasize the advantages of beef production
C. condemn the deforestation of the rain forest
D. argue for a decrease in beef consumption
高三英语阅读理解困难题查看答案及解析
Although human evolution has _______ in the past 10,000 years, we are changing our environment faster still.
A. linked up B. loaded up
C. sped up D. split up
高三英语单项填空中等难度题查看答案及解析
In English class, our teacher often creates an environment _____ we are given the opportunity to solve problems ourselves.
A. when B. where C. which D. that
高三英语单项填空中等难度题查看答案及解析
In English class, our teacher often creates an environment __________ we are given the opportunity to solve problems ourselves.
A．where B．when C．which D．that
高三英语单项填空中等难度题查看答案及解析
In English class, our teacher often creates an environment _____________ we are given the opportunity to solve problems ourselves.
| A．when | B．which | C．where | D．that |
高三英语单项填空简单题查看答案及解析
Motion pictures are so much a part of our lives that it’s hard to imagine a world without them. We enjoy them in theatres, at home, in offices, in cars and buses, and on airplanes.
① For about 100 years, people have been trying to understand why this medium has so attracted us. Films communicate information and ideas, and they show us places and ways of life we might not otherwise know. Important as the benefits are, though, something more is at stake. Films offer us ways of seeing and feeling that we find deeply satisfying. They take us through experiences. The experiences are often driven by stories, with characters we come to care about, but a film might also develop an idea or explore visual qualities or sound textures. A film takes us on a journey, offering a patterned experience that engages our minds and emotions.
② Films are designed to have effects on viewers. Late in the 19th century, moving pictures emerged as a public amusement. They succeeded because they spoke to the imaginative needs of a broad-based audience. All the traditions that emerged－ telling fictional stories, recording actual events, animating objects or pictures, experimenting with pure form－aimed to give viewers experiences they couldn’t get from other media. The men and women who made films discovered that they could control aspects of cinema to give their audience richer, more engaging experiences. Learning from one another, expanding and refining the options available, filmmakers developed skills that became the basis of film as an art form.
③ The popular origins of cinema suggest that some common ways of talking won’t help us much in understanding film. Take the distinction between art and entertainment. Some people would say that blockbusters(大片) playing at the multiplex are merely “entertainment”, whereas films for a narrower public－perhaps independent films for festival fare, or specialized experimental works－are true art. Usually the art / entertainment split carries a not-so-hidden value judgment: art is high-brow, whereas entertainment is superficial. Yet things aren’t that simple. As we just indicated, many of the artistic resources of cinema were discovered by filmmakers working for the general public. During the 1910s and 1920s, for instance, many films that aimed only to be entertaining opened up new possibilities for film editing. As for the matter of value, it’s clear that popular traditions can promote art of high quality. Cinema is an art because it offers filmmakers ways to design experiences for viewers, and those experiences can be valuable.
④ Sometimes, too, people treat film art as opposed to film as a business. This split is related to the issue of entertainment, since entertainment generally is sold to a mass audience. Again, however, in most modern societies, no art floats free of economic ties. Novels good, bad, or indifferent are published because publishers expect to sell them. Painters hope that collectors and museums will acquire their work. True, some artworks are funded through taxes or private donations, but that process, too, involves the artist in a financial transaction(交易). Films are no different. Others are funded by patronage or public moneys. Even if you decide to make your own digital movie, you face the problem of paying for it－and you may hope to earn a little extra for all your time and effort.
The crucial point is that considerations of money don’t necessarily make the artist any less creative or the project any less worthwhile. Money can corrupt any line of business (consider politics), but it doesn’t have to. In Renaissance Italy, painters were commissioned by the Catholic church to illustrate events from the Bible. Michaelangelo and Lenonardo da Vinci worked for hire, but it would be hard to argue that it hurt their artistry.
Here we won’t assume that film art prevents entertainment. We won’t take the opposite position either－claiming that only Hollywood mass-market movies are worth attention. Similarly, we don’t think that film art rises above commercial demand, but we also won’t assume that money rules everything. Any art form offers a vast range of creative possibilities. Our basic assumption is that as an art, film offers experiences that viewers find worthwhile.
1.Where should the sentence “It doesn’t happen by accident.” be put in the passage?
A. ① B. ②
C. ③ D. ④
2.Which of the following statements about film is TRUE?
A. Hollywood films are usually far more appealing.
B. Film offers a wide variety of creative possibilities.
C. Films are made in the hope that consumers will pay to see them.
D. When watching films, viewers feel controlled by film designers.
3.The writer uses the examples of Michaelangelo and Lenonardo da Vinci to ______.
A. indicate that money is unlikely to corrupt artistry
B. show that money doesn’t necessarily destroy artistry
C. prove that money cannot buy everything in the field of art
D. suggest that money is an important concern even for famous artists
4.According to the writer, film should ______
A. avoid concentrating on popular traditions
B. focus on artistry rather than entertainment
C. provide the audience with something worthwhile
D. earn enough to pay for the developers’ time and effort
5.Which of the following can be the proper title for the passage?
A. Film: art or business B. Art or entertainment
C. Film offers us experiences D. Money doesn’t rule everything
高三英语阅读理解中等难度题查看答案及解析
阅读七选五。
In our comparisonsoaked (攀比成风的) culture, it's hard to avoid slipping into “Why can't I？” mode. When one of my colleagues who I think is not better than me published a new book, I couldn't help complaining how unachievable it seemed to me and what bad luck I had. Negative feelings like this made life dark for us. 1. Here's what I learned：
Don't compare your insides to someone else's outsides.
The first time I heard this excellent advice, I was suffering from terrible envy. My professor's warning shocked me that “You have no idea what it took for them to get there. Don't just owe it to pure luck. 2.”
She was absolutely right, yet it's much easier to envy what they've got than to ask the serious questions: What are they modeling for me? What have they done to get where they are today? 3.
Transform comparison into celebration.
Admiration and envy are responses pointing us toward what we value most. 4. If you notice yourself admiring people who take creative risks, bring your full attention to the part of you that wants to be braver.
_5.
Next time you catch yourself admiring or envying someone's success, take a moment to consider: What qualities in them inspire me? Where do I presently display these qualities? Remember the light we see in others can help us see our own!
A．Use the success of others as a mirror.
B．Learn to appreciate others' shining points.
C．How to get rid of the harmful effects of comparison needs exploring.
D．However, there is no doubt that good luck can't be ignored.
E．Instead, you should find out what's really going on behind the scenes.
F．And once we become aware of what we value, we are much better positioned to create a richly satisfying life.
G．When we reflect on these questions, we shift immediately out of comparison mode and turn inwards.
高三英语七选五中等难度题查看答案及解析