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提问人：网友nhxy2005 发布时间：2022-01-07
[主观题]

Some call it the Smart Shooter, a new rifle for American infantry troops that is two weapo

ns in one, is accurate up to 1,000 yards and in 【21】______ fires 【22】______ corners. Its message to enemies is that they can run but they can't hide.

Still in the development phase, the rifle for 2006 has just been 【23】______ off with great 【24】______ by the Pentagon to members of Congress who will be asked to 【25】______ the money. The makers, Alliant Techsystems, say that the weapon will revolutionize 【26】______ combat much as the machine gun.

Pentagon jargon has given the new gun a(an) 【27】______ title: the Objective Individual Combat Weapon. 【28】______ one trigger, the rifle can fire a standard 5.56mm Nato bullet and a 20mm high explosive shell that will burst in the air. It can 【29】______ shrapnel behind, 【30】______ or even from the side of enemy troops who have taken 【31】______ behind a building. The shell can be 【32】______ to explode after a short delay. The weapon's 1,000 yard accuracy is twice 【33】______ of other rifles, made possible by a laser system built into the sight. This rangefinder fixes the target, measures the distance and passes it along to a computer chip in the shell.

The gunsight has an infrared lens for night 【34】______ . It can also have video camera with a zoom lens that is linked to a video display attached to the soldier's helmet, allowing him to aim 【35】______ without exposing himself to enemy return fire. But there are snags still be 【36】______ out. Two men were 【37】______ when a shell burst in a barrel during firing tests. The rifle weighs more than 18lb. There are questions whether its electronic innards will be rugged enough for rain, snow and difficult 【38】______ .

Michael Klare, a professor of peace and world security issues and a board member of the Arms Control Association, says that the Pentagon is seeking this combination of firepower and automation to compensate for the uncertain aim of GIs. He said: "Soldiers won't have to worry about careful steady aim. They'll just look 【39】______ the viewfinder and 【40】______ the trigger."

【21】

A．reality

B．affect

C．effect

D．operation

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更多“Some call it the Smart Shooter, a new rifle for American infantry troops that is two weapo”相关的问题
第1题
La Bretagne est une ______ région. (beau)
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第2题
第二篇 Smart Window

Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associ-ate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch.

"It took us a long time to figure out what a window really is, " says Claes Granqvist. He's a pro- fessor of solid-state physics at Uppsala University in Sweden. "It's contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows and natural light are important for improving the way people feel when they're stuck indoors.

Yet,windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it's hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Produ- cing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.

Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing,and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.

Electrochromic windows use electricity to change color. For example,a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed,that is,when the amount of voltage is decreased, the window darkens until it's completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.

One important feature that makes a smart window so smart is that it has a sort of "memory". All it takes is a small jolt of voltage to turn the window from one state to the other. Then,it stays that way. Transitions take anywhere from 10 seconds to a few minutes,depending on the size of the win- dow. The development of smart windows could mean that massive air conditioning systems may no lon- ger need. "In the future, " Granqvist says,"our buildings may look different. "

Which of the following statements does not indicate the importance of windows as described in the first two paragraphs？

A.Windows can change from clear to dark to save energy

B.Windows help to save energy by letting light in

C.Windows help to save energy by providing heat

D.Windows enable people to have contact with the outside world

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第3题
1.Amazon is struggling to contain rampant price-gouging by sellers capitalising on the fear surrounding the spread of the coronavirus.
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第4题
enthusiastically:_________________(v.)
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第5题
This natural _________ and caring helps to be really effective at helping others through problems.

A、empathy

B、temper

C、company

D、competition

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第6题
When the world was a simpler place, the rich were fat, the poor were thin, and right-thinking people worried about how to feed the hungry. Now, in much of the world, the rich are thin, the poor are fat, and right-thinking people are worrying about obesity.

Evolution is mostly to blame. It has designed mankind to cope with deprivation, not plenty. People are perfectly tuned to store energy in good years to see them through lean ones. But when bad times never come, they are stuck with that energy, stored around their expanding bellies.

Thanks to rising agricultural productivity, lean years are rarer all over the globe. Modernday Malthusians, who used to draw graphs proving that the world was shortly going to run out of food, have gone rather quiet lately. According to the UN, the number of people short of food fell from 920m in 1980 to 799m 20 years later, even though the world's population increased by 1.6 billion over the period. This is mostly a cause for celebration. Mankind has won what was, for most of his time on this planet, his biggest battle: to ensure that he and his offspring had enough to eat. But every silver lining has a cloud, and the consequence of prosperity is a new plague that brings with it a

host of interesting policy dilemmas.

As a scourge of the modern world, obesity has an image problem. It is easier to associate with Father Christmas than with the four horses of the apocalypse. But it has a good claim to lumber along beside them, for it is the world's biggest public-health issue today—the main cause of heart disease, which kills more people these days than AIDS, malaria, war; the principal risk factor in diabetes; heavily implicated in cancer and other diseases. Since the World Health Organisation labelled obesity an "epidemic" in 2000, reports on its fearful consequences have come thick and fast.

Will public-health warnings, combined with media pressure, persuade people to get thinner, just as they finally put them off tobacco? Possibly. In the rich world, sales of healthier foods are booming (see survey) and new figures suggest that over the past year Americans got very slightly thinner for the first time in recorded history. But even if Americans are losing a few ounces, it will be many years before the country solves the health problems caused by half a century's dining to excess. And, everywhere else in the world, people are still piling on the pounds. That's why there is now a consensus among doctors that governments should do something to stop them.

The author write this passage mainly to ______.

A．bring up some warnings.

B．tell the reader some new facts.

C．discuss a solution to a problem.

D．persuade the reader to keep fit.

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