Electric Backpack
Backpacks are convenient. They can hold your books, your lunch, and
a charge of clothes, leaving your hands free to do other things. Someday, if you
don’t mind carrying a heavy load, your backpacks might also power your MP3
player, keep your cell phone running, and maybe even light your way
home.
Lawrence C. Rome and his colleagues from the University of
Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,
Mass. , have invented a backpack that makes electricity from energy produced
while its wearer walks. In military actions, search and-rescue operations, and
scientific field studies, people rely increasingly on cell phones, global
positioning system (GPS) receivers, night-vision goggles, and other
battery-powered devices to get around and do their work. The
A. they can be very large.
B. they can hold as many things as you want to carry.
C. your hands are freed to do other things.
D. you do not have to carry things with you.
更多"{{B}}第一篇{{/B}}
Electric Ba"的相关试题:
[单项选择] {{B}}第一篇{{/B}}
Electric Backpack
Backpacks are convenient. They can hold your books, your lunch, and
a charge of clothes, leaving your hands free to do other things. Someday, if you
don’t mind carrying a heavy load, your backpacks might also power your MP3
player, keep your cell phone running, and maybe even light your way
home.
Lawrence C. Rome and his colleagues from the University of
Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole,
Mass. , have invented a backpack that makes electricity from energy produced
while its wearer walks. In military actions, search and-rescue operations, and
scientific field studies, people rely increasingly on cell phones, global
positioning system (GPS) receivers, night-vision goggles, and other
battery-powered devices to get around and do their work. The
A. It produces electricity for electronic devisees while the wearer walks.
B. It can be used as cell phones, GPS in the military actions or field studies.
C. It is small and convenient.
D. It is light and easy to carry.
[单项选择] Electric Backpack Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don’t mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home. Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass, have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and-rescue operations, and scientific field studies, people rely increasingly on cell phones, global positioning system (GPS) receivers, night-vision goggles, and other battery-powered devices to get around and do their work. The backpack’s electricity-generating feature could dramatically reduce the amount of a wearer’s load now devoted to spare batteries, repo A. they can be very large B. they can hold as many things as you want to carry C. your hands are freed to do other things D. you do not have to carry things with you
[单项选择]第一篇
March Madness
For the rest of the month, an epidemic (传染病) will sweep across the US. It will keep kids home from school. College students will ignore piles of homework. Employees will suddenly lose their abilities to concentrate.
The disease, known as "March Madness", refers to the yearly 65-team US men’s college basketball tournament. It begins on March 15 and lasts through the beginning of April. Teams compete against each other in a single elimination tournament that eventually crowns a national champion.
Nearly 20 million Americans will find themselves prisoners of basketball festival madness.
The fun comes partly from guessing the winners for every game. Friends compete against friends, husbands against wives, and colleagues against bosses.
Big-name schools are usually favored to advance into the tournament. But each year there are dark horses from little-known universities.
This adds to the madness. Watching
A. Great excitement will spread across the US.
B. Many Americans will be sent to madhouses.
C. About 20 million Americans will be put in prison.
D. A deadly epidemic will break out in the US.
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