Whenyouthinkofbatteries,you'lllikelythinkaboutthempower...

问题详情：

When you think of batteries, you'll likely think about them powering up remote controls, cellphones, flashlights and toys. But some people carry a battery around in their body to power a pacemaker (起搏器). It isn't really pleasant and easy to carry batteries because they need to be replaced so often and they can leak poisonous chemicals. A battery-powered pacemaker may become a thing of the past, thanks to a new technology developed by UCLA researchers: A biological supercapacitor (超级电容器), which is thinner than several hairs.

Teams of researchers at UCLA and the University of Connecticut published a paper in a journal explaining their new invention. The supercapacitor is made from a carbon_ material,and coated with human-like proteins that act as electrodes (电极). But what makes the device different is that it is powered by an energy harvester that changes body heat and movement in the blood into energy.

Those traditional pacemakers are six to eight millimeters thick They are much bigger. The new supercapacitor, which, due to its lack of battery, is only one micrometer thick. This "little" feature could benefit the new pacemaker's energy efficiency researchers stated. Also, unlike other batteries used in medical treatments, the supercapacitor can bend and twist in the body without suffering damage.

Though they've not been widely used in the medical world, supercapacitors have the ability ta serve as a safer and more efficient medical device than the traditional battery-operated devices, the researchers believe.

"In order to be effective, battery free pacemakers must have supercapacitors that can get, store and transport energy. However, commercial supercapacitors are too slow to make them work", said Maher El-Kady, a UCLA researcher and co-author of the study. "Our research focused on the custom-designed supercapacitor to capture energy effectively, and finding a way to make it exist together successfully with the human body."

do we know about traditional pacemakers?  

are very popular with users.                  need to be replaced quite often.

can do harm to the users' bodies.            are really convenient to carry around.

is special about the new supercapacitor?  

has electrodes on the outside,                     is made from a kind of protein material.

helps save the carriers' money and energy.   can transform the energy from the body.

h of the following makes the new pacemaker energy- efficient?

small size.                                             small battery.

energy harvester.                                    bending and twisting characters.

is the best title for the text? 

A.A New Pacemaker that Doesn't Need to Use Batteries

B.A Battery-Powered Pacemaker Is Harming People's Body

le Today Aren't Willing to Use the Traditional Pacemaker Any Longer

Researchers Are Committed to the Cause of the Medical Equipment

【回答】

1.C; 2.D; 3.A; 4.A 解析：1.细节理解题.根据第一段的It isn't really pleasant and easy to carry batteries because they need to be replaced so often and they can leak poisonous chemicals携带电池并不是很愉快和容易的事,因为电池需要经常更换,而且还会泄漏有毒的化学物质,可知,这种靠电池供电的起搏器可能会对人体产生伤害,故选C. 2.推理判断题.根据第二段最后一句But what makes the device different is that it is powered by an energy harvester that changes body heat and movement in the blood into Energy但是,这款设备的不同之处在于它是由一台能将人体热量和血液中的运动转化为能量的能量收割机驱动的,可知,这种新型超级电容器的特殊之处在于它能够转化来自身体的能量,故选D. 3.细节理解题.根据第三段的前三句 Those traditional pacemakers are six to eight millimeters thick. They are much bigger. The new Supercapacitor, which, due to its lack of battery, is only one micrometer thick那些传统的起搏器有6到8毫米厚.它们要大得多.新的超级电容器,由于缺少电池,只有一微米厚,可知,这种新型起搏器是因为尺寸小才节能,故选A. 4.主旨大意题.通读全文可知,本文主要介绍了一种可以借助身体发电的新型起搏器,和传统的起搏器相比,这种新型起搏器体积小,不需要电池,能与身体兼容,具有诸多优点,故选A.

知识点：科普环保类阅读

题型：阅读理解