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Paper or plastic?
Take a walk along the Chesapeake Bay,and you are likely to see plastic bags floating in the water. Ever since these now ubiquitous symbols of American super-consumption showed up in the supermarkets,plastic shopping bags have made their______(51)into local waterways,and from there,into the bay,where they can______（52)wildlife. Piles of them一the______（53)takes centuries to decompose一show up in landfills and on city streets.Plastic bags also take an environmental toll in the form of millions of barrels of oil expended every year to produce them.
Enter Annapolis______(54)you will see plastic bags distributed free in department stores and supermarkets.Alderman Sam Shropshire has introduced a well-meaning proposal to ban retailers ______(55) distributing plastic shopping bags in Maryland's capital. Instead,retailers would be required to offer bags______(56)recycled paper and to sell reusable bags.The city of Baltimore is considering a similar measure.Opponents of the idea,however,argue that______(57)bags are harmful,too:they cost more to make,they consume more______(58)to transport,and recycling them causes more pollution than recycling plastic.The argument for depriving Annapolis residents of their plastic bags is．______（59)accepted.Everyone in this______(60)is right about one thing:disposable shopping bags of any type are______(61),and the best outcome would be for customers to reuse bags instead.Annapolis's mayor is investigating how to hand out free,reusable shopping bags to city residents,a proposal that can proceed regardless of whether other bags are banned.A less-expensive______(62)would be to encourage retailers to give discounts to customers______(63)bring their own,reusable bags,a policy that a spokesman for the supermarket Giant Food says its chain already has in place.And this policy would be more______(64)if stores imitated furniture mega-retailer Ikea and charged for disposable bags at the checkout counter. A broad ban on the use of plastic shopping bags,which would merely replace some forms of pollution with others,is not the______(65).
_________(60)
A:competition
B:fight
C:quarrel
D:debate
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He was weary of the constant battle between them.
A: fond
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D: tired
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共用题干
Sharks Perform a Service for Earth's Waters
It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to1people frequently. But these fish perform a2service for earth's waters and for human beings. Yet business and sport fishing are threatening their3.Some sharks are at risk of disappearing from4.
Warm weather may influence both fish and shark activity. Many fish swim near coastal areas5their warm waters. Experts say sharks may follow the fish into the same areas,6people also swim. In fact,most sharks do not purposely charge at or bite humans. They are thought to mistake a person7a sea animal,such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up.Those are the8 when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.
A shark has an extremely good sense of smell. It can find small amounts of substances in wa-ter,such as blood,body liquids and9 produced by animals. These powerful10help sharks find their food. Sharks eat fish,any11sharks,and plants that live in the ocean.
Medical researchers want to learn more about the shark's body defense,and immune 12against disease. Researchers know that sharks13quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world's14.They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too15．This protects the plants and other forms of life that exist in the oceans.
8._________
A: times
B: places
C: seas
D: oceans
Sharks Perform a Service for Earth's Waters
It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to1people frequently. But these fish perform a2service for earth's waters and for human beings. Yet business and sport fishing are threatening their3.Some sharks are at risk of disappearing from4.
Warm weather may influence both fish and shark activity. Many fish swim near coastal areas5their warm waters. Experts say sharks may follow the fish into the same areas,6people also swim. In fact,most sharks do not purposely charge at or bite humans. They are thought to mistake a person7a sea animal,such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up.Those are the8 when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.
A shark has an extremely good sense of smell. It can find small amounts of substances in wa-ter,such as blood,body liquids and9 produced by animals. These powerful10help sharks find their food. Sharks eat fish,any11sharks,and plants that live in the ocean.
Medical researchers want to learn more about the shark's body defense,and immune 12against disease. Researchers know that sharks13quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world's14.They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too15．This protects the plants and other forms of life that exist in the oceans.
8._________
A: times
B: places
C: seas
D: oceans
共用题干
Robots may Allow Surgery in Space
Small robots designed by University of Nebraska researchers may______(51)doctors on Earth to help perform surgery on patients in space.
The______(52),wheeled robots,which are about 3 inches tall and as wide as lipstick case, can be slipped into small incisions and computer-controlled by surgeons in different______(53). Some robots are equipped with______(54)and lights and can send images back to surgeons and others have surgical tools attached that can be controlled______(55).
"We think this is going to replace open surgery," Dr. Dmitry Oleynikov said at a news ______(56).Oleynikov is a specialist in computer-assisted surgery at the University of Nebraska Medical Center in Omaha.
Officials hope that NASA will teach______(57)to use the robots soon enough so that surgeries could one day be performed in space.
On earth,the surgeons could control the robots themselves from other locations.For example, the robots could enable surgeons in other places to work on injured______(58)on the front line. Researchers plan to seek federal regulatory approval early next year. Tests on______(59)have been successful,and tests on humans in England will begin very soon.
The camera-carrying robots can provide views of______(60)areas and the ones with surgical tools will be able to maneuver inside the body in______(61)surgeons' hands can't. The views from
the camera-carrying robots are better than the naked eye,because they send back color images that are______(62).Because several robots can be inserted through one incision,they could reduce the amount and______(63)of cuts needed for surgery,which would decrease______(64)time. This is particularly helpful to those patients who have been debilitated by long illness.
______(65),Oleynikov said,the tiny robots may enable surgeons to work without even placing their hands in patients' bodies."That's the goal,"Oleynikov said."It's getting easier and easier. We can do even more with these devices.
_________(62)
A:magnified
B:minimized
C:reversed
D:redefined
Robots may Allow Surgery in Space
Small robots designed by University of Nebraska researchers may______(51)doctors on Earth to help perform surgery on patients in space.
The______(52),wheeled robots,which are about 3 inches tall and as wide as lipstick case, can be slipped into small incisions and computer-controlled by surgeons in different______(53). Some robots are equipped with______(54)and lights and can send images back to surgeons and others have surgical tools attached that can be controlled______(55).
"We think this is going to replace open surgery," Dr. Dmitry Oleynikov said at a news ______(56).Oleynikov is a specialist in computer-assisted surgery at the University of Nebraska Medical Center in Omaha.
Officials hope that NASA will teach______(57)to use the robots soon enough so that surgeries could one day be performed in space.
On earth,the surgeons could control the robots themselves from other locations.For example, the robots could enable surgeons in other places to work on injured______(58)on the front line. Researchers plan to seek federal regulatory approval early next year. Tests on______(59)have been successful,and tests on humans in England will begin very soon.
The camera-carrying robots can provide views of______(60)areas and the ones with surgical tools will be able to maneuver inside the body in______(61)surgeons' hands can't. The views from
the camera-carrying robots are better than the naked eye,because they send back color images that are______(62).Because several robots can be inserted through one incision,they could reduce the amount and______(63)of cuts needed for surgery,which would decrease______(64)time. This is particularly helpful to those patients who have been debilitated by long illness.
______(65),Oleynikov said,the tiny robots may enable surgeons to work without even placing their hands in patients' bodies."That's the goal,"Oleynikov said."It's getting easier and easier. We can do even more with these devices.
_________(62)
A:magnified
B:minimized
C:reversed
D:redefined
I rarely wear a raincoat because I spend most of my time in a car.
A:normally
B:seldom
C:frequently
D:usually
A:normally
B:seldom
C:frequently
D:usually
