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Originally from tropical South America, the red fire ant gained entry to the United States through the port of Mobile, Alabama in the late 1930s on cargo ships, but the first colony of the red ants was not found until 1942 by a 13-year-old boy in his backyard.
It immediately began to thrive in the new land and colonies spread quickly throughout the southeastern states. By 1975 the red imported fire ant had colonized over 52 million hectares of the United States. Now, it has infested more than 275 million hectares in the country.
Red imported fire ants build mounds in any type of soil. They also make mounds indoors. Each nest used to have but one queen, but now many mounds are often found with multiple queens. With multiple queens at work, its population increases rapidly. It’s common to find a nest with over 25,000 workers.
Red imported fire ants can cause a number of problems. They construct their colonies on precious farmland, invading crops while searching for insects underground. They also like to make their mounds in sunny areas, heavily infesting lawns and pastures. They can quickly strip fruit trees of their fruit. Small birds such as baby quails are fair game to the expanding colony. They appear to be attracted to electromagnetic fields and attack electrical insulation or wire connections. They can cause electrical shorts, fires, and other damage to electrical equipment. Worst of all, their stings can be deadly to livestock and humans.
53. When was the first nest of the red ant found in the United States?
(A) In 1930s. (B) In 1942. (C) In 1975. (D) After 1975.
54. Which of the following is TRUE according to the article?
(A) Each nest of the red ant has one queen.
(B) The red ant was originally found in North America.
(C) The red ant can reproduce young ants very quickly.
(D) The red ant does not build mounds inside the house.
55. What kinds of problems can the red ant cause?
(A) Health, social, and agricultural. (B) Health, social, and environmental.
(C) Social, environmental, and agricultural. (D) Health, agricultural, and environmental.
56. What is the purpose of the article?
(A) To ask for help to kill the red ant.
(B) To urge people to protect the red ant.
(C) To provide information about the red ant.
(D) To seek help from the government to control the red ant.
查看习题详情和答案>>Apple Inc co-founder and former CEO Steve Jobs, considered among the greatest American CEOs of his generation, died on Wednesday at the age of 56,after a year-long and highly public battle with cancer.
Jobs’ health had been a hot topic for years. His battle with cancer had been a deep concern to Apple fans, investors(投资人)and the company’s board alike.
Jobs’ death was announced by Apple in a statement late on Wednesday. They Apple.com homepage featured a black-and-white picture of him with the words“Steve Jobs,1955-2011”.A message on the site read,“Apple has lost a creative genius, and the world has lost an amazing human being.”
“Steve’s brilliance, passion and energy were the source of countless creations that enrich and improve all of our lives. The world is immeasurably better because of Steve,” Apple said in a statement announcing Jobs’ passing.
The news caused an immediate outpouring of sympathy. Microsoft co –founder Bill Gates said he will miss Jobs “immensely”
“By building one of the planet’s most successful companies from his garage, he was a typi-cal example of the spirit of American ingenuity(独创性).By making computers personal and putting the Internet in our pockets, he made the information revolution not only accessible. but fun, And by turning his talents to storytelling, he has brought joy millions of children and growu-ups alike.” said President Barack Obama.
Now, despite investor confidence in Cook, who has taken the place of his boss during three leaves of absence, there remain concerns about whether the company would stay creative without its founder at the helm.(掌舵)。
71.What can we learn about Jobs?
A.People knew little of his disease before he died.
B.He didn’t suffer much before his death.
C.A lot of people were concerned about his health.
D.He didn’t know that he was seriously ill.
72.The black-and-white picture of Steve Jobs is featured to .
A.tell people the story of Steve Jobs B.let more people learn about Apple
C.seek support for his battle with cancer D.announce that Jobs is dead
73.We can learn from the text that Apple .
A.is busy looking for a new CEO to replace Jobs.
B.sings high praise for Jobs’ contributions.
C.didn’t trust Jobs any longer after he got ill.
D.helped Jobs win the public battle with cancer.
74.After Steve’s death, .
A.Cook will be the leader of Apple.
B.Bill Gates will take over Apple.
C.Apple won’t no longer be so creative.
D.President Coama is still confident in Apple.
75.Where might you read the text?
A.In an English newspaper. B.In Apple.com homepage.
C.In a storybook for children D.In Obama’s speeches.
查看习题详情和答案>>
以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！
1．He was shivering, his face was white, and he walked slowly ________ it ached to move．
2．One was to ________ the fever, another a purgative, the third to overcome an acid condition．
3．Back in the room I wrote the boy's temperature down and ________ the time to give the various capsules．
4．He lay still in the bed and seemed very ________ what was going on．
5．It would have been natural for him to go to sleep, but when I looked up he was looking ________ the bed, looking very strangely．
6．We flushed ________ quails and I killed two as they went ________ over the top of the bank．
7．Some of them settled in trees, but most of them ________ bushes and it was necessary to jump on the ice-coated mounds of bushes several times before they would flush．
8．He was evidently ________ himself about something．
9．I ________ and opened the pirate book and began to read, but I could see he was not ________, so I stopped．
10．He had been waiting to die all day, ________ nine o'clock in the morning．
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trapped inside. "I was picking out gifts for the family our engine house adopted for Christmas," remembers
Quails, who has been fighting fires in Memphis for 24 years. "I had this sinking feeling as I got in my car and
headed over."
The last time Quails had been on Beeehmont Street was to install smoke detectors (感应器) at the Bateman-
Tubbs home. He'd been on a secret task to see if they needed extra help during the holidays. There he discovered
that the four Bateman-Tubbs children were sleeping on bare mattresses (床垫), and he found two of the boys
playing outside in 30-degree weather with no shoes or coats.
Quails learned that Leonard Tubbs was doing his best to make ends meet laying floors while Kimberly
Bateman stayed home with the kids.
"When Bobby told me his team wanted to be Secret Santas and buy my kids toys, at first I thought we didn't
need any help," Bateman recalls. "It really touched me. I told him what the kids really needed was warm clothes,"
That's exactly what Qualls was shopping for on December 9, 2010: winter jackets for Christopher, seven;
JoJo, four; Madison, one; and two-month-old Charles. While driving over to Beechmont Street, he dialed
Bateman's cell phone. She answered on the first ring, screaming, "The house is on fire-JoJo's trapped inside!"
By the time Quails reached the house, the family had gotten out, but their home was severely damaged; His
coworkers had found JoJo hiding under a pile of clothes in a back bedroom. He had stopped breathing and had
been given CPR and rushed to the hospital. Quails learned that JoJo was now on life support and might not make
it through the night. He rushed to the hospital with Lt. Mark Eskew, who placed a stuffed teddy bear in a
firefighter's suit on JoJo's bed.
"I just kept praying my little boy would open his eyes," Bateman recalls. "There was nothing else I could do.
They were pumping black and thick liquid out of his lungs and stomach for days."
After a few days, though, JoJo regained consciousness, and the tubes were taken out of his throat. While he
began to slowly recover, the local newspaper and TV stations got hold of the story, and the Secret Santa Plan of
Quails and his fellow firefighters, snowballed. Before long, the fire station was overflowing with boxes of toys,
food, towels, and clothes. People called, wanting to donate furniture and appliances (电器) too. By December
23, Bateman and Tubbs had moved their kids into a new rental home. By Christmas Eve, JoJo was ready to
leave the hospital, and the firefighters were ready to deliver the family their very own Christmas miracle.
"These guys aren't just firefighters," says Bateman, "they're our guardian angels. If they hadn't installed a
smoke detector that first day they came to our house, we wouldn't have known when the fire started. Then they
went the extra ten miles to give us a Christmas."
B. He hurried to the fire station.
C. He went to pick out gifts.
D. He went shopping in Beechmont.
B. Leonard Tubbs.
C. Kimberly Bateman.
D. Firefighters.
B. smoke detectors are very useful
C. Tubbs' home is filled with gifts
D. the fire was caused by the bare mattress
B. advise people to take good care of their children
C. ask people to give gifts to the firemen
D. praise the firemen for their good deeds