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题型:阅读理解-阅读单选 难度:0.65 引用次数:46 题号:19107544

Airplane crashes are rare. When they do happen, however, they are often deadly and people want answers as to why their loved ones lost their lives, and that is where black boxes come into play.

A black box is a device placed in an aircraft to make the investigation of aviation accidents easy.

There are two different flight recorder devices. The flight data recorder (FDR) preserves things like air speed, altitude, and fuel flow and has about 25 hours of recording storage. The cockpit (驾驶舱) voice recorder (CVR) preserves the recent history of the sounds in the cockpit, including the conversation of the pilots. However, a cockpit video recorder can store only two hours of voice recording. Both of them are mandatory on every commercial flight and are usually kept in the back end of an aircraft, where they are more likely to survive a crash.

Equipped with an underwater locator beacon (水下定位信标), if an aircraft crashes into water, the beacon sends out an ultrasonic pulse (超声波脉冲). Incredibly, the beacon is powered by a battery that has a shelf life of six years; once the beacon begins pinging (发出信号), it pings once per second for 30 days until its battery runs out. If a plane crash takes place on land and not on water, the locator beacons of the black box will not send out the ultrasonic pings, signaling the investigators to look for the unit around the crash site.

The term “black box” was a World War II British phrase, originating with the development of radio, radar, and electronic navigational aids in British and Allied combat aircraft (盟军战斗机). These often-secret electronic devices were literally encased in non-reflective black boxes or housings, hence resulting in the birth of “black box”.

These black boxes are of fluorescent (发荧光的) flame-orange in color. The recorders are bright orange so to make them more visually obvious after an accident. These are able to stand extreme heat, crashes and massive pressure. Before being put into use, they are examined repetitively in extreme situations to see if they can conduct the functions well.

1. If you want to know how high the plane was flying, you should check the ______.
A.the flight data recorder.B.the cockpit voice recorder.
C.an underwater locator beacon.D.the data of the analysis of the examination.
2. Which of the following is TRUE according to the passage?
A.The recorders are bright orange in that the color is obviously the most beautiful.
B.The black boxes will be put into use after being examined by experts.
C.The beacon sends out an ultrasonic pulse when the plane crashes in the mountains.
D.The back end of the plane is least likely to be damaged in a crash.
3. What is the main idea of paragraph 5?
A.How the black box got its name.
B.Some latest advances in military.
C.The black box will be taught in this new term.
D.The cruelty of the world war II.
4. What is the purpose of writing the passage?
A.To present the latest improvement in the black box.
B.To make a brief introduction to the black box.
C.To explain how the black box works.
D.To advertise an advanced black box.
【知识点】 科普知识 说明文

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【推荐1】What makes a person become an Olympic champion? In reality, a combination of biological environmental, and psychological factors as well as training and practice, all go into making a super athlete.

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How do athletes adjust to such intense pressure? Louganis explains how he learned to control his anxiety during a competition: "Most divers think too much…," he says. "They're too much in their heads. What worked for me was humor. I remember thinking about what my mother would say if she saw me do a bad dive. She'd probably just compliment me on the beautiful splash."

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A.Healthy Olympic Champions.
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【推荐2】Innovation is key to business survival, and companies put substantial resources into inspiring employees to develop new ideas but not necessarily succeed. And there are those who don’t have a budget, or much space, but who innovate successfully.

For Robert B. Cialdini, Professor of Psychology at Arizona State University, one reason that companies don’t succeed as often as they should is that innovation starts with recruitment. Research shows that the fit between an employee’s values and a company’s values makes a difference to what contribution they make and whether, two years after they join, they’re still at the company.

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Cialdini also believes that the “follow-the-leader syndrome” is dangerous, not least because it encourages bosses to go it alone. “It’s been scientifically proven that three people will be better than one at solving problems, even if that one person is the smartest person in the field. To prove his point, Cialdini cites an interview with molecular       biologist James Watson. Watson, together with Francis Crick, discovered the structure of DNA. “When asked how they had cracked the code ahead of other highly rival investigators, he said something that surprised me. He said he and Crick had succeeded because they were aware that they weren’t the most intelligent of the scientists pursuing the answer. The smartest scientist was called Rosalind Franklin who, Watson said, was so intelligent that she rarely sought advice.

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2020-05-21更新 | 69次组卷
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文章大意:本文是一篇说明文。文章主要介绍了路缘坡的历史、目的和重要性,以及其对人们日常出行的影响。同时文章介绍了“路缘坡效应”的原理,即当社会为弱势群体提供方便时,这种行为会传递给其他人,形成一个良性循环,最终受益的是整个社会。

【推荐3】The curb cut (路缘坡) is a convenience that most of us rarely, if ever, notice. Yet, without it, daily life might be a lot harder—in more ways than one.

Pushing a baby stroller onto the curb, skateboarding onto a sidewalk or taking a full grocery cart from the sidewalk to your car—all these tasks are easier because of the curb cut.

But it was created with a different purpose in mind.

It’s hard to imagine today, but back in the 1970s, most sidewalks in the United States ended with a sharp drop-off. That was a big deal for people in wheelchairs because there were no ramps (斜坡) to help them move along city blocks without assistance. According to one disability rights leader, a six-inch curb “might as well have been Mount Everest” for wheelchair-bound people. So, activists from Berkeley, California, who also needed wheelchairs, organized a campaign to create tiny ramps at intersections to help disadvantaged people dependent on wheels move up and down curbs independently.

I think about the “curb cut effect” a lot when working on issues around health equality. The first time I even heard about the curb cut was in a 2017 Stanford Social Innovation Review piece by PolicyLink CEO Angela Blackwell. Blackwell rightly noted that many people see equality as “a zero-sum game (零和游戏)”. Basically, there is a deeply rooted social belief among them that intentionally supporting one group hurts another. What the curb cut effect reveals though, Blackwell said is that “when society-creates the circumstances that allow those who have been left behind to participate and contribute fully, everyone wins.”

One such example is closed captioning (字幕), originally intended to help deaf people understand movies and TV shows without needing to hear dialogue or sounds. But it’s easy to think of other applications for closed captioning: it’s convenient for customers watching TV in a noisy bar or gym, second-language learners who want to read as well as listen, or students who use it as a study aid.

So, next time you cross the street, or roll your suitcase through a crosswalk or ride your bike directly onto a sidewalk—think about how much the curb cut, that change in design that broke down walls of exclusion for one group of people at a disadvantage, has helped not just that group, but all of us.

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