Question

【题目】The days of having to carry a phone charger everywhere could soon be over. Michigan researchers have revealed a major breakthrough in harvesting energy from human motion.

They say it could lead to smartphones powered for a week by the motion of a swipe (重击).

Michig an State Univ ersity’s low -cost devic e, known as a nanogenerator, has already been tested. Scientists success fully operated an LCD touch screen, a bank of 20 LED lights and a flexib le keyboard, all with a simple touching or pressing motion and without the aid of a battery. The groundbreaking findings, published in the journal Nano Energy, suggest “We’re on the path tow ard wearable devices powered by human motion,” said Nelson Sepulv eda, associate professor of electrical and computer engineering and lead researcher of the project.

“What I foresee, relatively soon, is the capability of not having to charge your cell phone for an entire week, for example, because that energy will be produced by your movement,” said Sepulveda, whose researchis funded by the National Science Foundation.

Electrical energy is created when the device is compressed by human motion. The completed device is as thin as a sheet of paper. The device used to power the LED lights was palm-sized, w hile the device used to power the touch screen was as small as a finger. Advantag es such as being lightweight, flexib le and low -cost could make it a promis ing and alternative method in the field of Mechanical-energy harvesting.

The device also becomes more powerful when folded. Sepulveda said, “You can start with a large device, but when you fold it once, and again, and again, it’s much smaller and has more energy. Now it may be small enough to put in a specially made heel of your shoe so it creates power each time your heel strikes the ground.”

Sepulveda and his team are also develop ing technology that w ould transmit the power generated by the heel strike to, say, a w irelessheadset.

【1】The underlined word “device” in the second paragraph probably refers to .

A. a piece of equipment B. a special kind of smartphone

C. a touch screen D. a flexible keyboard

【2】What can we learn about Nelson Sepulveda in the passage?

A. He works as a journalist writing for Nano Energy.

B. He plays a major role in the project of the nanogenerator.

C. He invented a type of battery-free smartphone.

D. He collects funds for the National Science Foundation.

【3】From the passage we know that the nanogenerator .

A. becomes more powerful when kept flat

B. has already come into market in the USA

C. is lightweight and flexible though expensive

D. makes it possible to produce power by walking

【4】The purpose of the passage is to .

A. persuade people to buy the device

B. bring in a new way to save energy

C. introduce a breakthrough in science

D. honor Nelson Sepulveda for his contributions

Answer 1

【答案】

【1】 A

【2】 B

【3】 D

【4】 C

【解析】

本文介绍了科学上的一项重大突破。密歇根的研究人员取得了一项重大突破, 可从人体动作中收集能量。

【1】词义猜测题。根据第二段第一句中known as a nanogenerator, has already been tested.即纳米发电器，已通过测试。可知前文划线部分的意思应该是“一种设备”，故选A。

【2】推理判断题。根据第二段最后一句“We’re on the path toward wearable devices powered by human motion,” said Nelson Sepulv eda, associate professor of electrical and computer engineering and lead researcher of the project.可知，Nelson Sepulveda在纳米发电机的项目中起着重要的作用。故选B。

【3】推理判断题。根据第二段中“We’re on the path toward wearable devices powered by human motion,” 我们正在走向可穿戴设备，由人体运动来驱动。可知通过步行来生产动力已变成可能。故选D。

【4】目的意图题。根据文章第一段“The days of having to carry a phone charger everywhere could soon be over.Michigan researchers have revealed a major breakthrough in harvesting energy from human motion.They say it could lead to smartphones powered for a week by the motion of a swipe（重击）. ”随身携带手机充电器的日子可能即将过去。密歇根的研究人员取得了一项重大突破, 可从人体动作中收集能量。研究人员称，从刷手机这一动作中获取的能量足以供智能手机续航一周。可知本文在介绍科学上的一项重大突破。故选C。

做推理判断题时，要抓住文章的主题和细节，分析文章结构，根据上下文内在联系，挖掘文章的深层含义。在进行推理时，考生一定要仔细阅读短文，千万不可脱离原文而仅凭个人的看法，主观臆断。本题第3小题，根据第二段中“We’re on the path toward wearable devices powered by human motion,” 我们正在走向可穿戴设备，由人体运动来驱动。可知通过步行来生产动力已变成可能。