Besides containing attractive flowers, trees and other plants that beautify the community, eco-friendly rain gardens are healthy for the environment and the people living and working nearby.
A rain garden is not very different from a traditional garden. It is just a far more eco-friendly garden. Usually it is built lower than the ground. Rain gardens make smart use of rain and storm water by temporarily holding water from rain and storms and letting it soak（浸人）slowly into the ground be
fore it runs into streams or enters the public drinking water supply.
Thus, a rain garden keeps the water, allowing it to be used as needed by plants in the rain garden, rather than flowing immediately into nearby streams and going unused. The water will soak slowly into the ground within a day or two. This creates an advantage that the rain garden does not allow mosquitoe
s to breed. This is a simple, attractive, and eco-friendly “green” way to treat storm water.
What’s more, planting a rain garden helps reduce pollution and improve the environment. Without using expensive machinery and chemicals, rain gardens remove harmful chemicals in the rainwater and cut down on the amount of pollution reaching streams and rivers by up to 30%.
Native plants are recommended for rain gardens because they are more used to the locals climatem, soil, and water conditions. They may attract local wildlife such as native birds. Water your rain garden immediately after planting and once a week, unless you have had at least an inch of rain during the week. Once the native plants establish the necessary root system, it will require little care.
Often, local governments and private businesses develop large rain gardens in their yards and in public parks as a way to improve the environment and solve flooding problems. However, you don’t need to be a professional environmental engineer to create a rain garden. As long as you’re eco-conscious homeowners, you can help the environment by building smaller rain gardens in your yards.Which of the following is the eco-friendly function of rain gardens discussed in Paragraph 4?
| A．They can keep the rain and storm water. |
| B．They can help reduce the pollution problem. |
| C．They can be healthy for the people around. |
| D．They can make the environment more beautiful. |
One of the main reasons why native plants are recommended is that .
| A．they cost less and are much easier to get |
| B．they may attract local wildlife to come |
| C．they require little care from the local gardeners |
| D．they are more used to the local growing conditions |
What do we know about rain gardens?
| A．They need little water after all the plants are planted. |
| B．They usually need at least an inch of rainwater a week. |
| C．They may attract local birds and change the locals climate. |
| D．They may reduce the water pollution problem by 70%. |
Who are the intended readers of the passage?
| A．Homeowners. | B．Governors. | C．Engineers, | D．Educators. |
More and more people take part in marathons these days – over 30,000 people will run the London Marathon this weekend, for instance. But it’s not just the 26 miles and 385 yards that could be a daunting prospect. “I have to admit to being completely frustrated by the blocking and for 18-19 miles was just keeping away from people and being held up,” one participant grumbled after the 2012 London Marathon. “I had to overtake a lot of people and ended up with bruised（淤肿的）forearms from all the elbows,” said another.
How do such crowding problems arise, and could they be reduced? Some researchers believe that we can find the answers through a more familiar system in which jams appear – road traffic flow. Martin Treiber, of the Technical University of Dresden in Germany, has previously developed models for traffic flow. One of the first attempts to model traffic flow was made in the 1950s by James Lighthill and his collaborator Gerard Whitham of Manchester University. They considered the traffic as a kind of liquid flowing down a pipe, and looked at how the flow changes as the fluid gets denser(浓稠). At first the flow rate increases as the density increases, since you simply get more stuff through in the same period of time. But if the density becomes too high, there’s a risk of jams, and the flow rate drops sharply.
Treiber’s model of a marathon uses this same principle that the flow rate first increases and then decreases as the density of runners increases, thanks to an sudden switch from free to crowded flow. He assumes that there is a range of different preferred speeds for different runners, which each maintains throughout the race. With just these factors, Treiber can calculate the flow rate of runners, knowing the “carrying capacity”(承载能力)at each point on the route.
This allows Treiber to figure out how blocking might depend on the race conditions – for example, for different starting procedures. Some marathons start by letting all the runners set off at once (which means those at the back have to wait until those in front have moved forward). Others assign runners to various groups according to ability, and let them start in a series of waves.
Treiber has applied the model to the annual Rennsteig half-marathon in central Germany, which attracts around 6,000 participants. The traditional route had to be changed in 2013, because the police were no longer willing to close a road to ensure that runners could cross safely. It could pass either over a 60m wooden bridge or through a tunnel. Treiber used his model to predict the likely blocking caused in the various options. The model predicted that a mass start would risk an overload of runners if the bridge were to be used. Only by moving the starting point further back from the bridge could the danger be avoided – and even then, if some of the numbers assumed in the model were only slightly inaccurate, there was still a risk of jams at the bridge. On the other hand, no dangerous blocking seemed likely for the tunnel route. The run organizers consulted Treiber’s team, and eventually chose this option.What is the worst thing while running a marathon?
| A．The long distance. | B．Too many participants. |
| C．The dangerous blocking. | D．Serious injuries in forearms. |
Which of the following statements is true?
| A．James Lighthill is the first expert trying to model traffic flow. |
| B．The denser the flow is, the faster the flow rate becomes. |
| C．The flow rate increases in the beginning because fewer people passed together. |
| D．The flow rate increases first and then decreases later when the flow is too denser. |
What is NOT true about the Rennsteig?
| A．It has much less participants than the London Marathon in 2014. |
| B．It has a shorter distance than the London Marathon. |
| C．The route was changed because the traditional one is not safe any longer. |
| D．The participants running this marathon will pass a tunnel because this choice is safer. |
What’s the main idea of the passage?
| A．Make a comparison between marathon and road traffic. |
| B．Running a marathon is somewhat dangerous if it is not well organized. |
| C．Introduce a new technology to solve the blocking problem in marathon. |
| D．Some advice for people who are to run a marathon. |
An 80-year-old man was sitting on the sofa in his house along with his 45-year-old highly educated son.
Suddenly a crow perched on their window.
The father asked his son, “What is this?”
The son replied, “It is a crow.”
After a few minutes, the father asked his son the 2nd time, “What is this?”
The son said, “Father, I have just now told you ‘It’s a crow’.”
After a little while, the old father again asked his son the 3rd time, “What is this?”
At this time some expression of irritation was felt in the son’s tone when he said to his father. “It’s a crow, a crow, a crow.”
A little after, the father again asked his son the 4th time, “What is this?”
This time the son shouted at his father, “Why do you keep asking me the same question again and again, although I have told you so many times ‘IT IS A CROW’. Are you not able to understand this?”
A little later the father went to his room and came back with an old tattered diary, which he had maintained since his son was born. On opening a page, he asked his son to read that page. When the son read it, the following words were written in the diary:
“Today my little son aged three was sitting with me on the sofa, when a crow was sitting on the window. My son asked me 23 times what it was, and I replied to him all 23 times that it was a crow. I hugged him lovingly each time he asked me the same question again and again for 23 times. I did not at all feel irritated, I rather felt affection for my innocent child.” The underlined word “irritation” in the passage means ___________.
| A．puzzlement | B．annoyance |
| C．patience | D．excitement |
Why did the old father keep asking his son the same question?
| A．Because he developed a kind of disease. |
| B．Because he was so boring that he wanted to play a joke with his son. |
| C．Because he wanted to know whether his son was as patient as he used to be. |
| D．Because his son used to love playing this game with him. |
How old was the father when he wrote down this page in the diary?
| A．35 years old | B．38 years old |
| C．45 years old | D．80 years old |
The reason why the father did not feel irritated when his son asked him the same question for 23 times is that _______________.
| A．he knew his son was still so innocent |
| B．the father was more patient than the son |
| C．the father had already got used to this kind of situation |
| D．the father loved his son so much that he never got tired of doing this again and again |
What would the son probably say after reading the words in the diary?
| A．“Sorry, dad. It’s all my fault to forget that.” |
| B．Nothing but felt rather ashamed. |
| C．“Sorry, dad. I shouldn’t have done that to you when I was such a young child.” |
| D．“Thank you, dad. I will do the same to my son.” |
Worried about how many calories you will get in that piece of pizza, chocolate cake or bag of chips? A new iPhone application (应用程序) MealSnap may help. Users just need to take a picture of the meal with the phone, and it will give a calorie read-out almost immediately.
MealSnap was developed by DailyBurn, a health social network that focuses on helping its users lead healthier lifestyles. It has created several other health and diet-related iPhone applications. The application gives users a quick reply. To do that, it matches the taken picture to a databank (数据库) with the calorie information of nearly 500,000 kinds of food. Users then get the range of calories for the meal that is photographed.
We started with something simple—an apple. A couple of minutes later, the application replied that it was an apple and between 64 and 96 calories. More impressive was the reply we received after sending a photo of a mixed salad bowl. MealSnap replied that the bowl contained “yellow rice with corn, boiled eggs and beans” and that the food was between 532 and 789 calories.
Mr. Smith, director of DailyBurn, said that usual calorie counting needed a long time, but that the application made it easier to know the calories in food. That is why it is so popular among those who are trying hard to lose weight.
In addition, MealSnap can act as a food diary. No need to write down what they’ve eaten, the photoes will be stored. The users can keep a visual log (视觉的记录). Mr. Smith said, “it’s like a food journey, but easier. All you do is to take the picture. The simple act of recording something can cause a psychological (心理的) change that can help people on their health journey. Knowing the calorie range makes me think more about what I’m eating.” The purpose of DailyBurn is to________.
| A．help people find ways to lose weight |
| B．make iPhone more popular |
| C．persuade people to buy iPhone products |
| D．help people have a healthy life |
What can be learned from the third paragraph?
| A．MealSnap is only useful for simple things. |
| B．The result of MealSnap isn’t always right. |
| C．MealSnap can also tell what the food is. |
| D．MealSnap needs a long time to show the calorie range. |
Which of the following statements about MealSnap is TRUE?
| A．It has been put into the market. |
| B．People will have a physical change by using it. |
| C．It’s popular because it was developed by DailyBurn. |
| D．People have to link iPhone with the Internet to use it. |
The fourth-graders at Chicago’s McCormick Primary School are unaware of the difficulty in learning Chinese. For most, who speak Spanish at home, it’s becoming their third language. They’ve been learning and using Chinese words since kindergarten, and it’s now second nature to give a hearty “ni hao” when strangers enter the classroom.
The classroom scene at McCormick is unusual, but it may soon be a common fixture(固定物) in American schools, where Chinese is rapidly becoming the hot new language. Government officials have long wanted more focus on security—useful languages like Chinese, and pressure from them—as well as from business leaders, politicians, and parents—has driven a quick growth in the number of programs.
Chicago itself is home to the largest effort to include Chinese in US public schools. The program here has grown to include 3,000 students in 20 schools, with more schools on a waiting list. Programs have also spread to places like Houston, Los Angeles, New York City, and North Carolina. It’s true that the number of students learning Chinese is tiny compared with how many study Spanish or French.
Advocates see knowledge of the Chinese language and culture as a help in a global economy where China is growing in importance. “This is an interesting way to begin to engage with the world’s next superpower,” says Michael Levine, director of education at the Asia Society, which has started five new public high schools that offer Chinese. “Globalization has already changed the arrangements in terms of how children today are going to need to think about their careers… The question is, when not whether, the schools are going to adjust.”
In Chicago, the trend extends beyond schools with high numbers of Asian students. “The fact that my students are 98% low income and 99% Latino(拉丁美洲人) and they are succeeding in this, tells me everyone should have a try at learning languages,” says Virginia Rivera, principal at McCormick. “We want to give our young people opportunities to advance… and Chinese is a great opportunity to survive in today’s economy,” says Richard M. Daley, Mayor of Chicago.The underlined word “Advocates” in the text probably means”.
| A．Supporters | B．Objectors | C．Teachers | D．Learners |
How many languages are mentioned in this passage?
| A．Six. | B．Two. | C．Three. | D．Four. |
In the last paragraph, the underlined word “this ”probably refers to _____.
| A．the competition between Latino and Asian students |
| B．the global economy |
| C．the interesting way to engage with China |
| D．the Chinese learning |
What CANNOT be learned from this passage?
| A．Most students at McCormick can speak three languages. |
| B．Chinese is gaining its popularity in all schools in Chicago. |
| C．French has far more speakers than Chinese does in Chicago. |
| D．Globalization in a way makes it necessary to learn Chinese. |
Which of the following is mainly about in this passage?
| A．The Chinese learning in Chicago. |
| B．The ways to learn Chinese. |
| C．McCormick Primary School. |
| D．Globalization and Chinese learning. |
On a hot summer day, a soft drink can really take away your thirst. At home, at school, in the park or at the movies---you can find one almost anywhere.
Carbonated
You can see bubbles(泡沫) in these! Of all soft drinks sold, about 75 percent are carbonated(碳酸的). But be careful, carbonated soft drinks have lots of sugar and caffeine(咖啡因). Caffeine is not very good for you in the summer because it takes water out of your body. And the sugar can make you overweight if you drink too much.
Fruit juice
There are different kinds of juice. One kind is made only from fresh fruit. This kind of fruit juice may not taste sweet enough for some people, but it is nutritious(有营养的). Another kind of fruit juice tastes good but has lots of sugar in it. Many young people buy this kind because the advertisements are good. It is bad for your teeth and bones to drink lots of this.
Energy drinks
These kinds of drinks have caffeine and things that make people get excited in them. They are sometimes called “party drinks”. Doctors say that if you drink too much of this kind, you may have a heart attack.
Bottled water
We have lots of different kinds of bottled water, such as mineral water, purified water and distilled water(蒸馏水). They are clean and easy to drink. But it is best not to drink very cold water. It may make your stomach feel bad.
Sports drinks
Most of these have funny names like “Scream(尖叫)” and “G-Vital(激活)”. They have lots of vitamins and minerals in them. After you play sports, you may want to drink one of these.
But if you just spend your summer holiday sitting around watching TV, you won’t need them at all!Which two types of drinks may make you overweight?
| A．Carbonated and fruit juice. |
| B． Energy drinks and sports drinks. |
| C．Carbonated and energy drinks. |
| D．Fruit juice and bottled water. |
Which one may lead to your heart disease?
| A．Carbonated. | B．Fruit juice. |
| C．Energy drinks. | D．Sports drinks |
After sports, you have sports drinks because______.
| A．they can take away your thirst |
| B．they can put back minerals you’ve lost in sweat |
| C．they have funny names that sound very exciting |
| D．they have no sugar |
The writer wrote this passage to______.
| A．warn us to keep away from soft drinks |
| B．teach us some useful ways of keeping healthy |
| C．tell us how to choose a good one from all kinds of drinks |
| D．make the advertisements for soft drinks |