题目内容

【题目】The disappearance of dinosaurs is not necessarily caused by astronomical incidents. But _________explanations are hard to find.

A.alternative B.aggressive C.ambiguous D.apparent

【答案】A

【解析】考查形容词。A. alternative可供替代的;B.aggressive好斗的,有进取心的;C.ambiguous 有野心的,耗时的;D.apparent显而易见的。句意:恐龙的消失未必是由天文事件引起的,但是难以找到其它解释。故选A。

练习册系列答案
相关题目

【题目】根据短文理解,选择正确答案。
You may have seen a talking parrot on a TV show, in a movie, or even in someone's home. The parrot has learned to copy sounds that people make. Birds are not the only animals that can copy the noises they hear. Dolphins, bats, and some apes also copy sounds. Now we can add elephants to this list of copycats.
Dr. Joyce Poole is a zoologist. She studies the sounds of elephants. While she was in Kenya, she would hear strange noises made by Mlaika after sunset. Mlaika was a 10-year-old African elephant.
Mlaika lived near a highway. Dr. Poole says, “I could not tell the difference between Mlaika's call and the distant truck noise.” She and other scientists studied Mlaika's sounds. It turned out that Mlaika was copying the sounds of the trucks driving by. Why would Mlaika copy trucks that she heard going by on the highway? Animals that are able to copy sounds may enjoy practicing new sounds. When they are kept outside of their natural environment, they may copy unusual sounds. That may be why an elephant would copy the sound of a truck.
“Mlaika was not the only copycat elephant,” Dr. Poole says. Calimero is a 23-year-old male African elephant. He spent 18 years with two female Asian elephants. Asian elephants make chirping sounds (sounds made by birds) to talk with one another. African elephants usually do not make chirping sounds. But Calimero now does. He is copying his Asian elephant friends. Dr. Poole says that elephants need to form bonds with their family and friends. She says, “They make sounds to communicate with each other. When they are separated, they use sounds to keep in contact.”
Parrots, dolphins, humans, and elephants show that being a copycat is one way that animals and people make new friends and keep old ones.
(1)According to Dr. Poole, what does Mlaika copy?
A.The sound of people.
B.The sound of trucks.
C.The sound of Calimero.
D.The sound of birds.
(2)From paragraph 4, we can know ________.
A.Calimero is a 23-year-old male Asian elephant
B.African elephants never make chirping sounds
C.Asian elephants make chirping sounds to talk with birds
D.Elephants make sounds to keep in touch with each other
(3)According to the passage, animals like to be copycats because they need_______.
A.To keep in touch with nature.
B.To please people and other animals.
C.To make new friends and keep old ones.
D.To avoid danger from the outside world.

【题目】根据课文内容填空。
(1)Later they may give performances in pubs or clubs, for which they are paid .
(2)Of course they hope to make records in a studio and sell millions of copies to .
(3)Today's festivals have , some religious, some seasonal, and some for special people or events.
(4)He thought of his mutton, beef and bacon cooked in the hottest, finest oil. His cola was sugary and cold, and his ice cream was made of milk, cream and delicious fruit. “,” he thought.
(5)RODERICK: do you know London? HENRY: Not at all, it's my first trip here.
(6)HENRY: Oh, yes. Well, towards nightfall I found myself to sea by a strong wind. It was all my fault.
(7)No one knows exactly how the earth began, as it happened so long ago. However, according to , the universe began with a "Big Bang" that threw matter in all directions.
(8)For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into .
(9)The earth became that it was not clear whether the shape would last or not. It exploded loudly with fire and rock.
(10)Skiing in the Rocky Mountains and sailing in the harbour make Vancouver one of Canada's most popular cities to live in. Its population is .
(11)The coast north of Vancouver has some of the oldest and most beautiful forests in the world. It is so wet there that the trees are extremely tall, someover 90 metres.
(12)That afternoon aboard the train, the cousins in their seats.
(13)Earlier that day, when they crossed the Rocky Mountains, they managed to some mountain goats and even a grizzly bear and an eagle.

【题目】根据短文理解,选择正确答案。
From: terri @ wombat. Com. Au
To: (happylizijun) @ yaboo. com. cn
Subject: My school
Hi, Li Zijun,
Thanks very much for your email. I really enjoyed reading it. I think we have a lot in common. I wonder if our school life is similar too.
I go to a big high school in Sydney called Maylands High School. There are about 1000 students and 80 or so teachers. My class has 25 students in it, which is normal for a Year 11 class. In the junior school there are about 30 students in a class.
In the senior high school we have lots of subjects to choose from, like maths, physics, chemistry, biology, history, German, law, geography, software design, graphic arts and media studies. (Different schools sometime have different optional subjects.) English is a must for everyone and we have to do least three other subjects in Year 11 and 12. At the end of Year 12 we sit for a public exam called the High School Certificate.
As well as school subjects, most of us do other activities at school such as playing a sport, singing in the choir or playing in the school band. We can also belong to clubs, such as the drama club, the chess club and the debating society.
We have a lot of homework to do in senior school to prepare for our exam, so unless I have basketball practice, I usually go straight home and start studying. I arrive home about 4 pm, make myself a snack and work till 6. Then I help the family to make dinner and we all eat together. I'm usually back in my room studying by 8 pm. I stop at about 10 o'clock and watch TV or read a book for half an hour to relax. On Saturdays, I usually go out with my family or with friends and I sleep in till late on Sunday morning. Then it's back to the books on Sunday afternoon.
How about you? What's your school life like? Do you have a lot of homework? What do you do to relax when you're not studying? I'm looking forward to finding out.
Your Australian friend
Terrie
(1)How many subjects do the students have to do at least in Year 11 and 12?
A.11
B.3
C.4
D.6
(2)What does the underlined phrase “sit for” in Para3 mean?
A.pass
B.take
C.go for
D.hold
(3)On Sunday afternoon, Terri usually______.
A.read books
B.play in the school band
C.play basketball
D.helps her family to prepare dinner

【题目】根据短文理解,选择正确答案。
My parents moved to Mississippi when my brother and I were small children, and we were separated from our Oklahoma grandparents by some 600 miles. This long distance allowed us to only visit our grandparents once a year, either at Christmas or during summer vacation.
Most of my classmates lived near their grandparents, and I would often hear stories of big families regularly spending time with one another, fishing at “grandpa's” house or going over to “grandma's”for her famous fried chicken. We were disappointed that we did not get to spend more time with our grandparents, but our love for them remained deep and strong.
We always expected a road trip to Oklahoma. We would count the days, and when the day came, the entire family would pile into our car at four o'clock in the morning. Crossing the Mississippi River into Louisiana, the scenery changed. Crossing the Red River in Oklahoma, we were in a foreign world.
Every trip to see my grandparents can't be without bringing delight. We jumped out of the car in their driveway to be met with bear hugs. My grandparents wanted to know everything about their grandchildren, and we would sit for hours and tell story after story. Grandma had a meal planned, and you could guess she prepared her grandsons' favorite foods. Of course the best part of the visit was that we were able to do whatever we wanted without punishment from our grandparents. Grandma and Grandpa always had presents for us, short trips planned and lovely surprises, such as the time we got to a local restaurant and ate the world's largest hamburger.
(1)Why didn't the family visit their grandparents often?
A.Because they seldom had a vacation.
B.Because they had a bad attitude to them.
C.Because they were all busy with their work.
D.Because they lived far away from each other.
(2)When hearing his classmates' stories, the author __________.
A.often felt deep sorrow
B.would call his grandparents
C.would admire them at heart
D.would feel sorry for his poor life
(3)Whenever the author and his brother met their grandparents, they _________.
A.were full of great excitement
B.found they were in a foreign world
C.shared cooking skills with each other
D.seemed not to be familiar with each other
(4)What can we infer from the author's story?
A.Distance can't break the bond of love.
B.Physical separation hurts the heart deeply.
C.Distance leads to the most beautiful scene.
D.Family life is filled with love and understanding.

【题目】Like many thickly populated urban neighborhoods, Lincoln Park also has rats. A lot of rats. “Every night when I walk down the sidewalk, I see rats, ” says 36-year-oId Kelly McGee, who has come to accept this aspect of city living. “It’s an urban area; I don't know what else we can expect.”

McGee lives just down the block from the old Children's Memorial Hospital, which is about to be torn down as part of a massive redevelopment project. “Construction all over the city often disturbs rats that are living underground,” says Lincoln Park’s City Council representative, Alderman Michele Smith. “Every developer has to do active rat reduction on site, ”Smith says. Already, there are poisonous and inviting food boxes all around the old hospital complex. But the developer of the hospital site still warned residents in a recent community meeting that when digging begins later this month, the rat problem could be awful.

Victoria Thomas, who lives a few miles north of Lincoln Park in Chicago’s Lake View neighborhood, says she tried everything from underground fencing to poison traps to wipe out rats, but nothing worked until she got some cats. From the first day she got the cats, Thomas says the rats started to disappear.

“The cats will kill off a great deal of the initial population of the rats, ”says Paul Nickerson, who manages the Cats at Work program for Tree House Humane Society. “And through spreading their pheromones, a chemical produced by an animal, the cats will keep other rats from filling their absence.” Nickerson says that is what makes the cat program so successful in keeping rats away for the long term. ” The rats are far from stupid. They smell the cats’ pheromones so they’ll stay out of the cats’ territory(领域).”

After Smith highlighted the program in a recent newsletter, Nickerson and Tree House Humane Society have been getting lots of calls from people seeking their own cat colonies. That means a lot more wild cats that might otherwise be killed out of pity will be cared for while doing something that they love: hunting rats.

1What is McGee’s attitude towards the rat problem?

A. Indifferent. B. Tolerant.

C. Annoyed. D. Frightened.

2What does the underlined word in the last but one paragraph refer to?

A. Rats’ stupidity.

B. Tree House Humane Society.

C. Cat’s nature of killing rats.

D. The smell of cat’s pheromones.

3What does the last paragraph suggest?

A. The program is a win-win thing.

B. Cats should be taken good care of.

C. Wild cats are more skilled at hunting.

D. It’s important to keep the ecological balance.

【题目】根据短文理解,选择正确答案。
It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves must be protected so that they will not disappear from the wilderness(荒野).
For Killing Wolves
In Alaska,the wolf almost disappeared a few years ago,because hunters were killing hundreds of them for sport. However, 1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur.So the wolf population has greatly increased. Now there are so many wolves that they are destroying their own food supply.
A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for food. Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life.When the deer can't find enough food,they die.
If the wolves continue to kill large numbers of deer, their prey(猎物) will disappear some day. And the wolves will, too. So we must change the cycle of life in the wilderness to balance the ecology. If we killed more wolves, we would save them and their prey from dying out. We'd also save some farm animals.
In another northern state, wolves attack cows and chickens for food. Farmers want the government to send biologists to study the problem. They believe it necessary to kill wolves in some areas and to protect them in places where there is a small wolf population.
Against Killing Wolves
If you had lived long ago,you would have heard many different stories about the dangerous wolf.According to most stories,hungry wolves often kill people for food.Even today,the stories of the “big bad wolf” will not disappear.
But the fact is wolves are afraid of people, and they seldom travel in areas where there is a human smell.When wolves eat other animals,they usually kill the very young, or the sick and injured. The strongest survive. No kind of animal would have survived through the centuries if the weak members had lived. And has always been a law of nature.
Although some people say it is good sense to kill wolves,we say it is nonsense! Researchers have found wolves and their prey living in balance.The wolves keep the deer population from becoming too large, and that keeps a balance in the wilderness plant life.
The real problem is that the areas where wolves can live are being used by people. Even if wilderness land is not used directly for human needs, the wolves can't always find enough food. So they travel to the nearest source, which is often a farm. Then there is danger. The “big bad wolf” has arrived! And everyone knows what happens next.
(1)According to the passage, some people in North America favor killing wolves for all the following reasons EXCET that ________.
A.there are too many wolves
B.they kill large numbers deer
C.they attack cows and chickens for food
D.they destroy the wilderness plant life
(2)According to those against killing wolves, when wolves eat other animals, ________.
A.they never eat strong and healthy ones
B.they always go against the law of nature
C.they might help this kind of animals survive in nature
D.they disturb the ecological balance in the wilderness
(3)The last sentence “And everyone knows what happens next” implies that in such cases ________.
A.farm animals will be in danger and have to be shipped away
B.wolves will kill people and people will in turn kill them
C.wolves wilI find enough food sources on famls
D.people will leave the areas where wolves can live

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网