游客
题文

Most of us think that when we step under a shower we’re getting clean.We are, but we’re also giving a home to lots of tiny little creatures we didn’t even know about.
A showerhead carries thousands of bacteria (细菌) called Mycobacterium.These can cause problems like coughs and tiredness, and a general feeling of poorliness (身体不舒服).When you turn on the water, the bacteria go from the showerhead onto and into your body.
This is a finding of Norman R.Pace and his team at the University of Colorado, in the US.The scientists investigated bacteria in all kinds of human environment, including showers.
Pace's team looked at 45 showerheads in nine American cities.They discovered that 30 percent of them had large amounts of flying Mycobacterium.
But Pace said that they pose few threats to the health.Only those with a frail (脆弱的) immune (免疫的) system might need to worry.
He told the New York Times that the bactertia are not as unpleasant as might be thought.He said that having a shower is no more dangerous than anything else we do in the morning.
But for those who feel sick about the idea of all those microorganisms (微生物), he had some advice.
Let the water run for 30 seconds before getting into the shower.Why? The number of bacteria is smaller than when the water is just turned on.If that seems like a waste of water, he added that you could also change your showerhead every few months.
But Pace had good news too.He has also been testing the air in US subways.Apart from iron particles (粒子), which are ground off the track by the wheels of trains, subway air is fresh.The reason is that a train’s movement pumps fresh outdoor air into the tunnels(隧道).
Pace explained that he wanted to understand the natural microbial(微生物的) environments of public places.This kind of knowledge might help detect the microbes to be used in a bioterrorist (生物恐怖分子) attack.
49.According to the finding of Norman R.Pace, after taking a shower, we might ______.
A.get much dirtier                B.be covered by bacteria
C.get a frail immune system      D.catch a cough or feel tired
50.Pace’s research into showers shows that ______.
A.there is no reason to fear microorganism
B.shower water contains much less bacteria after being left to run for 30 second
C.having a shower in the morning is more dangerous than at other time
D.of 45 showerheads surveyed in nine cities, 30 carried large amounts of Mycobacterium
51.According to the research of Pace’s team, which of the following contributes to fresh air in US subways?
A.Train wheels.               B.Iron particles.
C.The movement of the trains. D.Air conditioners on the trains.
52.The word “detect” in the last paragraph probably means “______”.
A.to discover      B.to protect        C.to make   D.to prevent

科目 英语   题型 阅读理解   难度 较易
登录免费查看答案和解析
相关试题

One day, our teacher talked about the stereotypes (固定看法) of different people. I learned the stereotypes of Mexicans: they are poor and lazy. I was ashamed of who I was because I am a Mexican and thought that it would be hard for me to be successful.
One day in the eleventh grade, we had a discussion in history class. The kid next to me said, "You look like one of those Mexicans who sell food in the street." I told him that he was also a Mexican. He said, "I don't look as Mexican as you. I have light skin." That was the first time that I'd heard someone say, "I don't look as Mexican as you." Could it be that the people who succeed in this country are those who look like an American?
Towards the end of the eleventh grade, I was asked to write a restaurant review. When I went to a restaurant, I saw the waiter talking to the chefs (厨师) and thought they were judging me. I felt nervous but I couldn't leave because I had to write the review. Minutes later, the waiter stopped talking and took my order. He was happy to serve me. I started asking him questions about his restaurant and I guessed that he liked that because he gave me a free dish. After I left the restaurant, I thought, "That's wasn't bad at all." Not all people think of me as a failure.
Now, I am running for the school president in my senior year. I am not sure if I can win, but I tell myself that if I want to be successful, I have to stop despising (鄙视) myself. I want to prove that Latinos can be successful. I do belong to the United States. An American is a person who overcomes struggles to become successful and that is what I'm doing.
In Paragraph 2, what the kid said to the author made him doubt whether ______.

A.he should laugh at the kid
B.the kid was a real Mexican
C.he should sell food in the street
D.the color of one's skin really mattered

The author's experience of finishing his restaurant review helped him realize that .

A.he could succeed easily if he tried his best
B.the waiters in America were all very friendly
C.not everyone in American looked down on Mexicans
D.he was actually popular with people around him

What is the main idea of the text?

A.Where one was born matters a lot.
B.Being a Mexican is hard in America.
C.Other people's opinions are very important.
D.It is what he does that makes him an American.

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.
The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.
Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue , encouraging customers to reuse their plastic bags, for example.
But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But is also applies to a wide range of consumer products, which often have far more packaging than necessary.
There are signs of hope. As more of us recycle, we are beginning to realise just how much unnecessary material are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.
What does the underlined phrase “over-consumption” refer to?

A.Using too much packaging.
B.Recycling too many wastes.
C.Making more products than necessary.
D.Having more material than is needed.

According to the text, recycling ______.

A.helps control the greenhouse effect
B.means burning packaging for energy
C.is the solution to gas shortage
D.leads to a waste of land

What can we learn from the last paragraph?

A.Fighting wastefulness is difficult.
B.Needless material is mostly recycled.
C.People like collecting recyclable waste.
D.The author is proud of their consumer culture.

Open Letter to an Editor
I had an interesting conversation with a reporter recently---one who works for you. In fact, he's one of your best reporters. He wants to leave.
Your reporter gave me a copy of his resume (简历) and photocopies of six stories that he wrote for you. The headlines showed you played them proudly. With great enthusiasm, he talked about how he finds issues (问题), approaches them, and writes about them, which tells me he is one of your best. I'm sure you would hate to lose him. Surprisingly, your reporter is not unhappy. In fact, he told me he really likes his job. He has a great assignment (分工), and said you run a great paper. It would be easy for you to keep him, he said. He knows that the paper values him. He appreciates the responsibility you've given him, takes ownership of his profession, and enjoys his freedom.
So why is he looking for a way out?
He talked to me because he wants his editors to demand so much more of him. He wants to be pushed, challenged, coached to new heights.
The reporter believes that good stories spring from good questions, but his editors usually ask how long the story will be, when it will be in, where it can play, and what the budget is.
He longs for conversations with an editor who will help him turn his good ideas into great ones. He wants someone to get excited about what he's doing and to help him turn his story idea upside down and inside out, exploring the best ways to report it. He wants to be more valuable for your paper. That's what you want for him, too, isn't it?
So your reporter has set me thinking.
Our best hope in keeping our best reporters, copy editors, photographers, artists---everyone--is to work harder to make sure they get the help they are demanding to reach their potential. If we can't do it, they'll find someone who can.
What does the writer think of the reporter?

A.Optimistic.
B.Imaginative.
C.Ambitious.
D.Proud.

What does the reporter want most from his editors in their talks?

A.Finding the news value of his stories.
B.Giving him financial support.
C.Helping him to find issues.
D.Improving his good ideas.

Who probably wrote the letter?

A.An editor.
B.An artist.
C.A reporter.
D.A reader.

The letter aims to remind editors that they should __

A.keep their best reporters at all costs
B.give more freedom to their reporters
C.be aware of their reporters' professional development
D.appreciate their reporters' working styles and attitudes


I hated dinner parties. But I decided to give them another shot because I'm in London. And my friend Mallery invited me. And because dinner parties in London are very different from those back in New York. There, '“I’m having a dinner party' means: "I'm booking a table for 12 at a restaurant you can't afford and we'll be sharing the checque evenly, no matter what you eat." Worse, in Manhattan there is always someone who leaves before the bill arrives. They'll throw down cash, half of what they owe, and then people like me, who don’t drink, end up paying even more. But if I try to use the same trick, the hostess will shout: "Where are you going?" And it's not like I can say I have somewhere to go: everyone know I have nowhere to go.
But in London, dinner parties are in people's homes. Not only that, the guests are an interesting mix. The last time I went to one, the guests were from France, India. Denmark and Nigeria; it was like a gathering at the United Nations in New York. The mix is less striking. It's like a gathering at Bloomingdale's, a well-known department store.
For New Yorkers, talking about other parts of the world means Brooklyn and Queens in New York. But at Mallery's, when I said that I had been to Myanmar recently, people knew where it was. In New York people would think it was a usual new club
What does the word "shot" in Paragraph 1 probably mean?

A.Choice.
B.Try
C.Style.
D.Goal

What does the writer dislike most about dinner parties in New York?
A There is a strange mix of people.
B. The restaurants are expensive.
C. The bill is not fairly shared.
D. People have to pay cash
What does the author think of the parties in London?
A. A bit unusual
B.Full of tricks.
C.Less costly.
D More interesting.
What is the author's opinion of some New Yorkers from her experience?

A.Easy-going.
B.Self-centred.
C.Generous.
D.Conservative.

It was a village in India. The people were poor. However, they were not unhappy. After all, their forefathers had lived in the same way for centuries.
Then one day. Some visitors from the city arrived. The told the villagers there were some people elsewhere who liked to eat frog’s legs. However, they did not have enough frogs of their own, and so they wanted to buy frogs from other place.
This seemed like money for nothing. There were millions of frogs in the fields around, and they were no use to the villagers. All they had to do was catch them. Agreement was reached, and the children were sent into the fields to catch frogs. Every week a truck arrived to collect the catch and hand over the money. For the first time, the people were able to dream of a batter future. But the dream didn’t last long.
The change was hardly noticed at first, but it seemed as if the crops were not doing so well. More worrying was that the children fell ill more often, and, there seemed to be more insects around lately.
The villagers decided that they couldn’t just wait to see the crops failing and the children getting weak. They would have to use the money earned to buy pesticides(杀虫剂) and medicines. Soon there was no money left.
Then the people realized what was happening. It was the frog. They hadn’t been useless. They had been doing an important job---eating insects. Now with so many frogs killed, the insects were increasing more rapidly. They were damaging the crops and spreading diseases.
Now, the people are still poor. But in the evenings they sit in the village square and listen to sounds of insects and frogs. These sounds of the night now have a much deeper meaning.
From paragraph I we learn that the villagers __________.

A.worked very hard for centuries
B.dreamed of having a better life
C.were poor but somewhat content
D.lived a different life from their forefathers

Why did the villagers agree to sell frogs?

A.the frogs were easy money
B.They needs money to buy medicine
C.they wanted to please the visitors
D.the frogs made too much noise

What might be the cause of the children’s sickness?

A.the crops didn’t do well
B.there were too many insects
C.the visits brought in diseases
D.the pesticides were overused

What can we infer from the last sentence of the text?

A.Happiness comes from peaceful life in the country
B.Health is more important than money
C.The harmony between man and nature is important
D.good old day will never be forgotten

Copyright ©2020-2025 优题课 youtike.com 版权所有

粤ICP备20024846号