Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.
Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades.
"We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO2 levels. And we've been able to record this increasing quantity of atmospheric CO2 into the ocean."
Scientists expected that as atmospheric CO2 increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.
"As carbon dioxide dissolves（溶解） in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the pH down, and makes it more acidic."
The seawater Dore and his colleagues have analyzed confirms what the theory predicts.
The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.
"It's important to realize that the oceans are really becoming acidic. And it can have negative impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."
53．What can be the best title of the passage?
A．Sea Life Facing Danger B．Climate Change Affecting Seawater
C．Oceans Becoming More Acidic D．Scientist Researching Seawater
54．Which of the following shows the process of the impact of atmospheric CO2 on sea life?
a．Sea life is endangered．
b．CO2 goes into the surface water．
c．The ocean chemistry is affected．
d．CO2decreases the PH and makes the seawater more acidic．
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e．CO2 levels in the atmosphere go up．
55．Scientist Robert Dore came to the conclusion based on__________.
A．his research and analysis
B．a major cause of climate change
C．some former theory
D．the expectation of other scientists
56．What does the passage want to tell us most?
A．It takes time to make a scientific study．
B．Atmospheric CO2 is doing harm to sea life．
C．Robert Dore is a committed and serious scientist．
D．Measures should be taken to prevent the potential catastrophe．
Falling temperatures are no excuse to avoid outdoor exercise with your dog. Along with making sure you are appropriately dressed, your dog should also be properly protected from the elements. Some large breed dogs such as Labrador Retrievers, Golden Retrievers, German Shepherds and Huskies can tolerate the colder weather better than others. These dogs may also develop a thicker coat over time as they are exposed to colder weather.
Smaller breeds, however, like Chihuahuas and Miniature Pinschers, breeds with short coats and puppies should wear some type of protection, i.e, a coat or sweater, if the temperature drops too low. Look for coats or sweaters with high collars or a turtleneck that covers your dog from the base of the tail on top to the belly underneath.
Dog booties (毛线鞋) provide good protection from chemicals or salts on the pavement as well as mud. If you don’t use the booties, be sure to wipe your dog’s paw pads with room temperature water after taking it outside.
Other tips
When you bathe your dog, dry him completely before taking him out in the cold weather for a walk or exercise. It is especially important to keep your dog well groomed (打扮) during the winter months to protect him from the elements.
If your dog frequently participates in outdoor activities during the colder months, increase his food intake, especially protein, to help keep his coat grow thick and healthy. Dogs that are not as active during the winter months may need to have their food consumption reduced.
The amount of time you spend outside with your dog will depend on his size, breed type and age. Remember that ill or elderly dogs are more sensitive to cold weather. Dogs whom cold weather agrees with can spend hours outside without getting cold but some of the smaller and younger dogs’ exercise sessions should be kept shorter. Dogs should not be left outside unattended.
Another activity to consider is doggie daycare, which is an excellent alternative during cold weather months. It’s a great place for your dog to get plenty of physical and mental stimulation while being with other dogs.
Banfield Pet HospitalThe underlined word “elements” in the first paragraph probably means ______.
| A．extreme weather | B．potential enemies | C．serious diseases | D．terrible accidents |
Dog owners are advised to ______ in the text.
| A．bathe their dogs less during the winter months |
| B．avoid outdoor exercise with their dogs in cold weather |
| C．make their dogs wear booties for a walk outside every time |
| D．feed their dogs more food if they’re frequently taking them out in winter |
The author thinks dog owners should_________ in the cold weather.
| A．not walk the dog | B．protect their dog pets from being hurt |
| C．stop walking the dog | D．avoid walking the dog |
What can we conclude from the text?
| A．Small breed dogs are usually more tolerant of cold weather than larger ones. |
| B．Smaller and younger dogs tend to become less active in cold weather. |
| C．Dogs’ paw pads should be thoroughly cleaned after outdoor activities in winter. |
| D．A trip to doggie daycare can get dogs better prepared for outdoor activities. |
What is the best title for this passage?
| A．How to make your dog exercise in cold weather | B．Walk dogs in the cold weather |
| C．Dogs like to take exercise in winter | D．Take good care of dogs |
Are you carrying too much on your back at school? I’m sure lots of children of your age will say “Yes”. Not only the students in China have this problem, but children in the United
States also have heavy school bags.
Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.
“It’s hard for me to go upstairs with my bag because it’s so heavy,” said Rick Hammond, an 11-year-old student in the US.
Rick is among students who have common school bags with two straps (带子) to carry them, but many other students choose rolling bags.
But even with rolling bags, getting up stairs and buses is still a problem for children. Many of them have hurt their backs and necks because of the heavy school bags.
But how much is too much? Doctors say students should carry no more than 10% to 15% of their own body weight.
Scott Bautch, a back doctor, said children under Grade 4 should stay with 10%. But it is also important that older children don’t stay with over 15%, because their bodies are still growing. “Children are losing their balance and falling down with their school bags,” he said.
Parents and teachers are starting to tell children to only take home library books they will be reading that night. Some teachers are using pieces of paper or thin workbooks for students to take home.
One of the best answers is, as some children said, to have no homework at all!From the passage we can know that .
| A．only children in China carry too heavy school bags |
| B．both children in China and the US carry too heavy school bags |
| C．children in other countries don’t carry too heavy bags |
| D．only children in the US carry too heavy school bags |
Children feel it hard for them to go upstairs because ________.
| A．they are too young |
| B．they don’t know how to go upstairs |
| C．their school bags are too heavy |
| D．their parents don’t always go upstairs with them together |
If a child carries a heavy school bag, .
| A．his back and neck will be hurt | B．his head and arms will be hurt |
| C．his hands will be hurt | D．his feet will be hurt |
According to the doctor, Scott Bautch, if a child in Grade 5 weighs about 30 kilos, the school bag he carries should not be over ________.
| A．5 kilos | B．3 kilos | C．5.5 kilos | D．4.5 kilos |
Some students think the best answer to his problems is that .
| A．they should have a little homework to do after they get home |
| B．their teachers had better not ask them to do any homework |
| C．they should only take home library books they will read that night |
| D．they should use thin workbooks instead of thick ones |
The other day I heard a few local musicians talking:
"I hate all the pianos in this town and I hate that rubbish they play on the radio .They cannot every understand rhythm（韵律)"
"Nobody wants to pay musicians anything. I'm sick of all the people who want you to play without paying you."
One younger musician said, "There are several clubs who want me to play for a few nights a month and I'm trying to find other places to play .I'm also planning to join in several summer festivals this year."
I really liked what the younger musician said so I made friends with him.
Attitudes are important. Whether they're positive or negative(消极) they're all rubbing off on you,If you're around people who are always complaining or blaming others, it is possible that you will start doing the same as well. If you spend lots of time with people who don't support your dreams, it is time to take a look at the people you call " friends".
There is an easy exercise you can try. Make a list of the people who you often stay with, and simply stop , spending time with the negative ones on your list. Set a new standard for yourself and don't become friends with people who fall below that standard.
Of course, this exercise is entirely different from making friends only for the good of oneself. We really should try to help and spend time with those who are working towards a goal or dream.The musicians' conversation at the beginning is there to show that
| A．musicians' living conditions are not good |
| B．people in that town have poor taste in music |
| C．young people are more likely to succeed |
| D．different musicians have different attitudes |
The underlined part in Para. 6 means________.
| A．they'll have an influence on you | B．they'll help you realize your dreams |
| C．they'll keep you from moving on | D．they'll push you ahead very hard |
Why did the author want to make friends with the younger musician?
| A．He is more active than the others. |
| B．He can earn more than the others. |
| C．His attitude is more positive than the others. |
| D．He has more things to do than the others. |
By doing the exercise mentioned in Para. 7, you can________.
| A．improve your ability to make friends |
| B．make the right kind of friends for sure |
| C．develop a better relationship with your friends |
| D．make some new friends with similar interests |
We can get the following information from the passage EXCEPT________.
| A．the younger musician is a positive person and would be a good friend |
| B．one should avoid making friends with people having lots of difficulties |
| C．the exercise can help you keep close to really helpful friends |
| D．one will start complaining if one spends too much time with negative people |
"If there is one thing I'm sure about, it is that m a hundred years from now we will still be reading newspapers. It is not that newspapers are a necessity. Even now some people get most of their news from television or radio. Many buy a paper only on Saturday or Sunday. But for most people reading a newspaper has become a habit passed down from generation to generation.
The nature of what is news may change .What basically makes news is what affects our lives - the big political stories, the coverage of the wars, earthquakes and other disasters, will continue much the same. I think there will be more coverage of scientific research, though .It's already happening in areas that may directly affect our lives, like genetic（基因的） engineering. In the future, I think there will be more coverage of scientific explanations of why we feel as we do - as we develop a better understanding of how the brain operates and what our feelings really are.
It's quite possible that in the next century newspapers will be transmitted（传送）electronically from Fleet Street and printed out in our own home. In fact ,I'm pretty sure how it will happen m the future. You will probably be able to choose from a menu, making up your own newspaper by picking out the things you want to read - sports and international news, etc.
I think people have got it wrong when they talk about competition between the different media（媒体）．They actually feed off each other. Some people once foresaw that television would kill off newspapers, but that hasn't happened. What is read on the printed page lasts longer than pictures on a screen or sound lost in the air. And as for the Internet. it's never really pleasant to read something just on a screen.What is the best title for the passage?
| A．The Best Way to Get News | B．The Changes of Media |
| C．Make Your Own Newspaper | D．The Future of Newspaper |
In the writer's opinion, in the future, _______.
| A．more big political affairs, wars and disasters will make news |
| B．newspapers will not be printed in publishing houses any longer |
| C．newspapers will cover more scientific research |
| D．more and more people will watch TV |
What will probably be on in the newspaper made by yourself?
| A．Sports and international news. | B．A menu of important news. |
| C．The most Important news. | D．what you are interested in. |
From the passage, we can infer ________.
| A．newspapers will win the competition among the different meclia |
| B．newspapers will stay with us together with other media |
| C．television will take the place of newspaper |
| D．the writer believe some media will die out |
The phrase "feed off" in the last paragraph means ________ .
| A．depend on | B．compete with | C．fight with | D．kill off |
Being in an unfamiliar school can be frightening. If you start a new school, you'll have to worry about making friends. Here are some simple tips which help you make new friends more easily.
·Try speaking to the students you're sitting next to in class. As they're close by, it is easy to chat to them first.
·Try to speak to everyone in your class. You will study here for three years, so it helps if you get along well with them.
·If you don't have many friends in your class, try and make new friends in your neighbor classes. You can also chat to them at lunchtimes and after school.
·Join a lunchtime or afterschool club. You'll get to meet kids of all years that way.
·Ask your teacher to pair you With another student.
·Use your "celebrity status"(名人身份）! Since you're the new person, you'll have got celebrity status, which you can use for a couple of weeks.
·Talk to classmates, remember to smile, and be open and friendly. Don't break in while your classmates are speaking. When your classmates talk to you, you should listen carefully and look at them in the eye to make them feel important.
·As you grow older, it's natural to make new friends and sometimes that means you begin to grow apart from your old friends. So try and make time for all your friends. But what if a friendship group is pushing you out? If this is happening to you, ask someone you're friendly with what has happened .If the friendship is hopeless, try to find new friends.According to the passage, moving to an unfamiliar school is_______.
| A．interesting | B．exciting | C．uncomfortable | D．boring |
What is the purpose of the passage?
| A．To explain how to make new friends easily. |
| B．To show how to be used to new school life． |
| C．To encourage people to make new friends. |
| D．To introduce how to live in a new school. |
It is suggested that you should ________.
| A．try to study well to be popular with the classmates |
| B．try all your best to help your new classmates |
| C．sit close to a familiar classmate in the classroom |
| D．catch every opportunity to communicate with others |
To make your classmates feel that they are important to you, you can
| A．smile while talking with them | B．watch and listen to them carefully |
| C．be friendly and open to them | D．make use of your celebrity status |
If a friendship group is leaving you out, you should
| A．make your different friends know each other |
| B．forget them and make new friends at once |
| C．try to know the reason from a close friend |
| D．turn to your teachers or parents for help |
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