A group of Mississippi hunters who shot and killed an alligator (短吻鱷) weighting 910 pounds on Sunday, were amazed when they discovered that the animal already bore injuries caused by musket (步槍)from the Civil War era. A total of 9 bullets was found, and the various tests and analysis have confirmed that they were indeed fired at the animal in the 19th Century.

Nine of the wounds on the animal are believed to have been caused by Enfield Pattern 1853 muskets. These old injuries were concentrated around the animals tail and hind legs, suggesting that the alligator could have possibly been used as a target for shooting practice by Confederate troops.

The huge animal also bore five other bullet wounds from three different calibers (口徑）of hunting guns, as well as many dents and scars, which shows that it survived many firearm injuries in the past. It did not however, survive the six 50-caliber bullets fired at him by the group of amateur hunters from Jackson, who were finally able to take it down.

The bullets were confirmed as true musket from between 1850 and 1870. This incredible animal brings a whole new view on this large animal native to the southeastern United States. American alligators have been known for years to live well over 50 years and were thought capable of possibly living as long as 70 or 80 years, but this one was estimated to have been 185 years old at the time of its death.

Others like turtles, have been known, to have lifespans of over 150 years, but it is the first of crocodile of such an old age ever found. It is also one of the biggest alligators ever killed in the United States. The heaviest ever recorded, weighing in at an unbelievable 1,011.5 lbs, was pulled out of a river in Alabama in August of this yea.

1.Which of the following facts about the nine wounds is amazing ?

A. They didn’t cause death to the alligator.

B. They were concentrated around the animals’ tail and hind legs

C. They left many dents and scars on the alligator.

D. They were left by musket from the Civil War era.

2.What can be learned about American alligators?

A. They have a lifespan of over 150 years.

B. They can live as long as 70 or 80 years.

C. They weigh as much as 910 pounds on average.

D. They are the biggest alligators of all

3.What can be inferred from the passage ?

A. People’s understanding of American alligators may be changed

B. Rivers in Alabama must be full of such huge alligators

C. American alligators are in danger of dying out.

D. The six 50-caliber bullet is the most powerful one.

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As Artificial Intelligence（AI） becomes increasingly sophisticated, there are growing concerns that robots could become a threat. This danger can be avoided, according to computer science professor Stuart Russell, if we figure out how to turn human values into a programmable code.

Russell argues that as robots take on more complicated tasks, it’s necessary to translate our morals into AI language.

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The biggest concern with robots going against human values is that human beings fail to so sufficient testing and they’ve produced a system that will break some kind of taboo（禁忌）.

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If the robot is unsure whether an animal is suitable for the microwave, it has the opportunity to stop, send out beeps(嘟嘟聲), and ask for directions from a human. If we humans aren’t quite sure about a decision, we go and ask somebody else.

The most difficult step in programming values will be deciding exactly what we believe in moral, and how to create a set of ethical rules. But if we come up with an answer, robots could be good for humanity.

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B. It accompanies all machinery involving high technology.

C. It can be avoided if human values are translated into their language.

D. It has become an inevitable peril as technology gets more sophisticated.

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D. By imitating the behavior of property brought-up human beings.

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D. Do sufficient testing before taking action.

5.What is most difficult to do when we turn human values into a programmable code?

A. Determine what is moral and ethical.

B. Design some large-scale experiments.

C. Set rules for man-machine interaction.

D. Develop a more sophisticated program.

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