Question

【题目】 Wang Zhonglin started playing table tennis only four years ago. But last year, he and other researchers came up with a clever way to up their game; Build a smart table.

Now they've built a prototype (样品). It can measure where a ball lands, how fast the ball's going, where it's headed and the angle it was traveling. The table can do that because its special wood surface forms the top layer (层) of a novel self-powered sensor. The data it acquires could guide players to perform better.

Importantly, the new smart table won't need a battery to detect the ball. When a ball hits the wood, it sets off a chain of events that can both produce a small electric current(电流) and record measurements of the ball's behavior.

What makes the new game table truly unique is its use of wood as one of the layers because wood can produce electricity by rubbing against it. But Wang's group realized they couldn't rely on wood that comes directly from a tree. It's too hard and too easily broken. They needed a kind of wood that could bend. So they boiled the wood in chemicals for seven hours. Then they dipped the wood in boiling water. Once it came out of the boiling baths, the wood bent easily.

The scientists then cut the treated wood into small squares. Each measured just 1.8 inches on a side. Those squares became the top layer. Beneath this wood, they added a layer of metal to conduct electricity. They attached that layer to a metal wire. Then, instead of using a table-tennis ball, they hit the surface with a type of hard plastic. When it registered an electric current, they moved on to building a test table.

“It is amazing. To me, self-powered sensors of wood is the first move toward using energy harvesting and sensing in sports," said Askar, an engineer in Canada. And it need not end with table tennis, he added.

【1】What can we know about Wang's invention?

A.Its battery lasts very long.B.It sells well in the market.

C.It can accelerate the ball's speed.D.It can judge the ball's direction.

【2】Why did Wang use wood surface?

A.It is easy to get.B.It can produce electricity.

C.It is hard enough.D.It is environmentally friendly.

【3】What was the wood like after being treated?

A.It bent easily.B.It shrunk greatly.

C.It broke easily.D.It became harder.

【4】What can be inferred from Askar's words?

A.Sports meets will end with a table tennis match.

B.The technology will be used in other sports.

C.Table tennis isn't the first to use self-powered sensors.

D.The table tennis ball will be self-powered in the future.

Answer 1

【答案】

【1】D

【2】B

【3】A

【4】B

【解析】

这是一篇说明文。文章主要介绍了一种新的发明——智能乒乓球桌面。它可以感知乒乓球的速度、方向等，从而帮助人们提高球技。

【1】

细节理解题。根据第二段中的“It can measure where a ball lands, how fast the ball's going, where it's headed and the angle it was traveling.(它可以测量球在哪里落地，球速多快，前进的方向和穿行的角度)”可知，智能乒乓球桌能够感知球的方向。故选D项。

【2】

细节理解题。根据第三段最后一句“When a ball hits the wood, it sets off a chain of events that can both produce a small electric current(当球碰到木头时，它可以发出一连串可以产生电流的事件)”可知，科学家之所以使用木头，是因为木头在敲击下会产生电流。故选B项。

【3】

细节理解题。根据第四段最后一句“Once it came out of the boiling baths, the wood bent easily.”可知，经过处理过的木头变得容易弯曲。故选A项。

【4】

推理判断题。根据文章最后一段尤其是最后一句“And it need not end with table tennis, he added.”（他补充说，它不需要结束于乒乓球。）可知，Askar认为木头的自供电传感器是在运动中使用能量收集和传感的第一步，不会结束于乒乓球领域，以后会逐渐应用到其他运动中。故选B项。