Mattel Inc.is recalling 4.4 million Polly Pocket toys with magnets   after some of them caused serious injuries to children who swallowed magnets that fell off.Tiny magnets inside the toys may fall off without being noticed by parents and babysitters.The magnets can be swallowed or placed in children' s noses or ears.When more than one magnet is swallowed, the magnets can attract each other and cause intestine perforations   which can be deadly.        The Consumer Product Safety Commission received 170 reports of the magnets coming out of these recalled toys.There were three reports of serious injuries to children who swallowed more than one magnet.All three suffered intestine perforations that required operations.A 2-year-old child stayed in hospital for 7 days and a 7-year-old child was hospitalized for 12 days.        The recalled Polly Pocket toys contain plastic dolls and accessories   that have small magnets.The magnets measure one-eighth inch in diameter   and are fixed in the hands and feet of the dolls, and even in the plastic clothing, hairpieces and other accessories to help the pieces stay on the dolls or the dolls' houses.        The model number is printed on the bottom of the largest pieces on the toys.Contact Mattel if you cannot find a model number on your product to determine if it is part of the recall.Polly Pocket magnetic toys currently sold in stores are not included in this recall.The model numbers included in the recall are: B2632, B3158, B7118, G8605, H1537 and H3211.The toys were on sales in department stores and toy stores from May 2006 through September 2009.        Consumers should immediately take these recalled toys away from children and contact Mattel for the return of the toys.For more information contact Mattel at 888 597-6597 anytime or visit the company' s website. We can learn from the passage that   _  . A) it is the magnets that cause the problem B) the recalled toys are popular with children C) doctors still don' t have the effective treatment D) consumers will get extra pay from the company
A
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A Tale of Two Cities was written by the famous English writer Charles Dickens. The tale is mainly about the French Revolution in 1789, where the poor rose up against the king and the nobles. Dickens showed deep sympathy for the poor and deep hatred for the cruelty of the upper class, though he wrote quite a lot about the love triangle between Lucie, Charles and Sydney. In this novel, Dickens wrote some lively characters like Sydney and those crazy revolutionaries. In this tale, we can't see any absolute roles. Charles, though he's a brave and good man, obviously he hasn't as much ability as Sydney. Sydney, a typical tragic  man, a man like him, usually has great ability. But he has some weak points on characters and the worst is that he always loves a woman he shouldn't love and 99.99% die for her at last in an extremely heroic or tragic way. The revolutionaries are not as full of justice as usual. They get mad when they can get revenge  for their unfair treatment. The fire of hatred burns everything. When they're at the bottom of the society, they're calling for justice, for fair treatment, for freedom, but when they're in charge of the society, their world is up-side-down. They hate everything that is connected to the very people against them, even including Charles' wife, Dr. Manette's daughter. So _ have no difference from those former governors at heart. Though Dickens told us how the authority is recycling over and over again in some way, the novel is about something good. Love from Sydney to Lucie is one of the only few bright points in the novel and it's really great. A man can sacrifice his life to save his lover's husband. He doesn't have any personal purpose and just for his lover's happiness. So Dickens may imply us, only love can solve the problems between people, between the poor and the rich, love is everything. . A Tale of Two Cities is mainly about  _  . A) Charles Dickens B) the French Revolution C) deep sympathy D) the upper class
B
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When an ant dies, other ants move the dead insect out. Sometimes, the dead ant get moved away very soon--within an hour of dying. This behavior is interesting to scientists, who wonder how ants know for sure--and so soon--that another ant is dead. One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist. Choe found that Argentine ants have a chemical on the outside of their bodies that signals to other ants, "I'm dead--take me away." But there's a _ to Choe's discovery. Choe says that the living ants--not just the dead ones--have this death chemical. In other words, while an ant crawls around, perhaps in a picnic or home, it's telling other ants that it's dead. What keeps ants from dragging away the living ants?Choe found that Argentine ants have two additional chemicals on their bodies, and these tell nearby ants something like, "Wait--I'm not dead yet." So Choe's research turned up two sets of chemical signals in ants: one says, "I'm dead," and the other set says, "I'm not dead yet." Other scientists have tried to figure out how ants know when another ant is dead. If an ant is knocked unconscious, for example, other ants leave it alone until it wakes up. That means ants know that unmoving ants can still be alive. Choe suspects that when an Argentine ant dies, the chemical that says "Wait-I'm not dead yet" quickly goes away. Once that chemical is gone, only the one that says "I'm dead" is left. "It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard, not because its body releases  new unique chemicals after death," said Choe. When other ants detect the "dead" chemical without the "not dead yet" chemical, they drag away the body. Understanding this behavior may help scientists figure out how to stop Argentine ants from invading new places and causing problems. Choe would like to find a way to use the newly discovered chemicals to spread ant killer to Argentine ant nests. The ants' removal behavior is important to the... The result of the research can be used to  _  . A) kill troublesome pests B) solve the problem of endangered species C) prevent further expansion of the ants' territory D) keep the balance of nature

C
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