题目内容
Eye injuries from paintball games have increased among children, even as the protective equipment for the sport has improved, according to a study released yesterday in the journal pediatrics.
The Federal Consumer Product Safety Commission estimated the number of emergency room visits for eye injuries caused by paintballs at 545 in 2001 and more than 1,200 in 2003. More than 40 percent of those injuries were believed to involve children, the study said.
Paintballs are fired at a speed of up to 300 feet a second, the study said. Being so small, they can fit inside the bones meant to protect the eye. The study’s author, Dr. David A. Listman of St. Barnabas Hospital in the Bronx, said paintball shopping centers had generally switched to full face masks（面罩），which have become more effective at protecting the eyes than earlier gear. But most injuries now occur in backyard play, which is more likely to involve teenagers or children.“The injuries being seen are mostly in people who did not wear the proper, or for that matter any, safety equipment,”Dr. Listman said.
Those injuries can involve permanent（永久性的）damage to sight, he said.
Dr. Listman said he believed that paintball guns should be restricted to regulated places. In the absence of such action, parents should limit children’s access to the guns and insist on proper protection. Paintball guns“should be treated with the same respect as any other firearm,”he said“These are the only guns that are made to shoot at your friends.”
56．Paintballs may cause injuries mainly because of .
A．their content and size B．their speed
C．their shape D．their content and shape
57．The word“gear”（in paragraph 3）means .
A．medicine B．material C．technique D．equipment
58．What do you learn form Dr. Listman?
A．Children should not play paintball guns everywhere.
B．Many more children were injured in 2003 than in 2001.
C．The improved equipment is still ineffective for children.
D．Every eye injury from paintballs will finally lead to blindness.
59．Which of the following might be the proper title for the passage?
A．Children: How You Should Play Properly
B．Parents: Keep Children Off Paintballs
C．Safety: When Paintball Meets Eyeball
D．Guns: Only Made to Shoot at Your Friends
心算口算巧算一课一练系列答案
应用题作业本系列答案Millions of people around the world cook their food over smoky fire every day.It is often difficult to find wood for the fire .People who do not have wood must spend large amounts of money on cooking fuel. However, there is a much easier way to cook food using energy from the sun.
Solar cooker, or ovens,have been used for centuries.A Swiss scientist made the first solar oven in seventeen sixty-seven. Today ,people are using solar cookers in many countries around the world. People use solar ovens to cook food and to heat drinking water to kill bacteria and other harmful organisms.
There are three kinds of solar ovens.The first is a box cooker, It is designed with a special wall that shines or reflects sunlight into the box .Heat gets trapped under a piece of glass or plastic covering the top of the cooker. A box oven is effective for slow cooking of large amonts of food.
The second kind of solar oven is a panel cooker. It includes several flat walls.or panels.that directly reflect the sun’s light onto the food. The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much.In Kenya ,for example ,panel cookers are being manufactured for just two dollars.
The third kind of solar oven is a parabolic cooker.It has rounded walls that aim sunlight directly into the bottom of the oven .Food cooks quickly in parabolic ovens .However, these cookers are hard to make.They must be re-aimed often to follow the sun .Parabolic cookers can also cause burns and eye injuries if they are not used correctly.
You can make solar ovens from boxes or heavy paper. They will not catch fire. Paper burns at two hundred thirty-two degrees Celsius. A solar cooker never gets that hot. Solar ovens cook food at low temperatures over long periods of time. This permits people to leave food to cook while they do other things.
1.What is the main purpose of the author in writing the passage?
A.To tell the readers how to make solar ovens.
B.To advertise the solar ovens.
C.To give the readers brief introduction of solar ovens.
D.To help readers to save cost on fuel.
2.According to the passage we can conclude that ______.
A.panel cooker is the cheapest oven of the three
B.panel cooker is easy to make
C.box cooker is easy to make
D.box cooker is the most effective oven
3.If you have much food to cook ,you’d better choose .
|
A.a box cooker |
B.a panel cooker |
|
C.a parabolic cooker |
D.a paper cooker |
4.From the passage we know that .
A.solar cookers are dangerous to use
B.solar cookers don’t burn while cooking
C.solar cookers cost less than other cookers
D.Swiss often use solar cookers while cooking
Millions of people around the world cook their food over smoky fire every day.It is often difficult to find wood for the fire .People who do not have wood must spend large amounts of money on cooking fuel. However, there is a much easier way to cook food using energy from the sun.
Solar cooker, or ovens,have been used for centuries.A Swiss scientist made the first solar oven in seventeen sixty-seven. Today ,people are using solar cookers in many countries around the world. People use solar ovens to cook food and to heat drinking water to kill bacteria and other harmful organisms.
There are three kinds of solar ovens.The first is a box cooker, It is designed with a special wall that shines or reflects sunlight into the box .Heat gets trapped under a piece of glass or plastic covering the top of the cooker. A box oven is effective for slow cooking of large amonts of food.
The second kind of solar oven is a panel cooker. It includes several flat walls.or panels.that directly reflect the sun’s light onto the food. The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much.In Kenya ,for example ,panel cookers are being manufactured for just two dollars.
The third kind of solar oven is a parabolic cooker.It has rounded walls that aim sunlight directly into the bottom of the oven .Food cooks quickly in parabolic ovens .However, these cookers are hard to make.They must be re-aimed often to follow the sun .Parabolic cookers can also cause burns and eye injuries if they are not used correctly.
You can make solar ovens from boxes or heavy paper. They will not catch fire. Paper burns at two hundred thirty-two degrees Celsius. A solar cooker never gets that hot. Solar ovens cook food at low temperatures over long periods of time. This permits people to leave food to cook while they do other things.
1.What is the main purpose of the author in writing the passage?
A.To tell the readers how to make solar ovens.
B.To advertise the solar ovens.
C.To give the readers brief introduction of solar ovens.
D.To help readers to save cost on fuel.
2.According to the passage we can conclude that ______.
A.panel cooker is the cheapest oven of the three
B.panel cooker is easy to make
C.box cooker is easy to make
D.box cooker is the most effective oven
3.If you have much food to cook ,you’d better choose .
| A.a box cooker | B.a panel cooker |
| C.a parabolic cooker | D.a paper cooker |
4.From the passage we know that .
A.solar cookers are dangerous to use
B.solar cookers don’t burn while cooking
C.solar cookers cost less than other cookers
D.Swiss often use solar cookers while cooking