Question

Mya Le Thai is a scientist studying at the University of California, Irvine. She recently discovered a process that may result in batteries that last forever. Thai said she had been discouraged that the batteries for her wireless devices degrade. Over time, they fail to charge fully.

Thai did not like to have keep her wireless laptop connected to an electrical outlet. She decided to do something about that problem.

At first, she and her team thought about inventing a new battery. But as they experimented, Thai discovered something that might permit lithium-ion(锂离子) batteries to last forever. Lithium-ion batteries power most wireless devices. Over time, the batteries lose the ability to hold a charge. Most of these batteries have a life span of about 7,000 charging cycles before they die.

One of the reasons lithium-ion batteries degrade is their use of nanowires(纳米线) to carry electricity. Nanowires are extremely thin. A human hair is thousands of times thicker, for example. Nanowires are extremely efficient carriers of electricity, which makes them useful in batteries. But Thai said their thinness also makes them weak. "Nanowires break over time," she said. "That's why they lose capacity."

But, Thai had a theory: The nanowires might last longer if covered with a material. She and the team tested her theory. The team tried many coverings for the wires. PMMA was one of them. The nanowires were coated with PMMA and cycled through charges 200,000 times. The PMMA coated nanowires showed no evidence of damage. The results suggest that batteries could last forever, without losing charging ability.

Thai hopes to continue her research to understand why this material works so well and to see if any other material could create better results.

"It's kind of cool," she said. "I'm really glad people are showing interest in my work and not just in the work itself, but also in technology and energy."

1.What caused Thai to do research on the batteries?

A. Weak power of the batteries    B. Her preference for batteries

C. Inconvenient use of batteries    D. Her habit to use her computer

2.What’s the disadvantage of lithium-ion batteries?

A. They have a certain service life    B. They need charging very often

C. They are not quite dependable    D. They are easy to break down

3.Why did Thai try covering the nanowires with a certain material?

A. To make them thicker    B. To carry more electricity

C. To make them safer to use    D. To protect them from being damaged

4.What can be a suitable title for the text?

A. All Batteries Would Be Replaced By Long-Last Ones

B. Lithium-ion Batteries Might Come to an End

C. Batteries That Last Forever Could Be Near

D. Batteries Would Work Without Recharging

Answer

根据She recently discovered a process that may result in batteries that last forever总结概括文章☞C选项 Batteries That Last Forever Could Be Near

【解析】科技给我们带来方便的同时也带来了烦恼，有多少人能解决这些烦恼呢？加州大学的科学家Mya Le Thai最近发现了电池能终身使用的过程。

1.细节理解题。根据第二段Thai did not like to have keep her wireless laptop connected to an electrical outlet. She decided to do something about that problem. Thai 经常使用无线手提电脑，她发现不得不把无线电脑连接到电源插座上。这让她感到很不方便，因此她决定做电池的研究。故选D。

2.细节理解题。根据第三段Over time, the batteries lose the ability to hold a charge. Most of these batteries have a life span of about 7,000 charging cycles before they die.可以得知锂电池的缺点是它有一定的使用年限。故选A。

3.推理判断题。根据第五段But, Thai had a theory: The nanowires might last longer if covered with a material. Thai 有一个理论：纳米线在覆盖上一层物质后使用寿命更长。 故选D。

4.主旨大意题。根据全文大意得知本文主要讲述的是：加州大学的科学家Mya Le Thai最近发现了电池能终身使用的过程。因此最佳标题是：实现电池终身寿命的日子临近。 故选C。

【名师点睛】

主旨大意主要的解题策略有：

（1）标题类。文章标题可以是单词，短语，也可以是句子，它的特点是：短小精悍，多为一短语；涵盖性强，一般要求能覆盖全文，其确定的范围要恰当，既不能太大，也不能太小；精确性强，不能随意改变语言表意的程度及色彩。

（2）主旨类。概括主旨的方法是：先看首尾或各段开头再看全文找主题句，若无明显主题句，就通过关键词句来概括(如议论文中寻找表达作者观点态度的词句，记叙文寻找概括情节和中心的动词或反映人物特点的形容词)。文中出现两种或两种以上的不同观点时，务必牢记作者的观点才是体现全文中心的。此时，要注意一些转折词，如but, yet, however, although, in spite of, by contrast, on the contrary等。当文章中表示相反的观点时，往往用到这些词。答题时要弄清哪个是作者的观点，排除迷惑性信息，准确归纳主旨大意。

4.C【解题剖析】此题属于主旨大意中的（1）一一标题类。答案需要理解文章后归纳文章中心。

【答案定位】根据第一段中的She recently discovered a process that may result in batteries that last forever.可知，加州大学的科学家Mya Le Thai最近发现了电池能终身使用的过程。

【推理关系】题干What can be a suitable title for the text?.☞文章内容She recently discovered a process that may result in batteries that last forever.☞概括总结☞Mya Le Thai发现了电池能终身使用的过程☞标题