Whenyouthinkofbatteries,you'lllikelythinkaboutthempower...

問題詳情：

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 (超級電容器), 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 (電極). 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.細節理解題.根據第一段的It isn't really pleasant and easy to carry batteries because they need to be replaced so often and they can leak poisonous chemicals攜帶電池並不是很愉快和容易的事,因為電池需要經常更換,而且還會泄漏有毒的化學物質,可知,這種靠電池供電的起搏器可能會對人體產生傷害,故選C. 2.推理判斷題.根據第二段最後一句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,這款設備的不同之處在於它是由一台能將人體熱量和血液中的運動轉化為能量的能量收割機驅動的,可知,這種新型超級電容器的特殊之處在於它能夠轉化來自身體的能量,故選D. 3.細節理解題.根據第三段的前三句 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那些傳統的起搏器有6到8毫米厚.它們要大得多.新的超級電容器,由於缺少電池,只有一微米厚,可知,這種新型起搏器是因為尺寸小才節能,故選A. 4.主旨大意題.通讀全文可知,本文主要介紹了一種可以藉助身體發電的新型起搏器,和傳統的起搏器相比,這種新型起搏器體積小,不需要電池,能與身體兼容,具有諸多優點,故選A.

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