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."

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

    Have you got any wonderful plans for your coming summer vacation? Here are some wonderful films for you to kill time.

Away We Go

    With a baby on his way, a young couple, Burt and Verona, look at their lives and are puzzled about what they really want. So they hit the road and seek a place to call home. On their journey, they visit a handful of characters and learned a lot.

It's about taking the scenic route in life, preparing for the hope and excitement and fear of new beginnings, while never forgetting to look out of the window.

Orphan

    Esther, a bright and well-behaved child, however, is not as innocent as she appears. Soon after being taken home, the peace of her adoptive family is completely changed You want a good horror film about a child from hell Then you got one! Do not, in any cases, take children to see it.

                                                                                          500 Days of Summer

    Tom is in love with Summer from the moment he sees her. Can he accept that she simply likes him for now, not for forever The movie is about Tom wrestling with that reality. Tom remembers his love, Summer, as a series of joys and bafflements (疑惑). But Summer is just herself and he cannot have her.

    Here is a rare movie that begins by telling us how it will end and is about how the hero has no idea why.

2012

The director Roland Emmerich successfully dresses an old story with an old Mayan prediction, which is believed by many to happen in the coming 2012 and as a result, attracts millions of people into the cinema.

    It's just an entertaining Hollywood blockbuster （大片）with plenty of jokes, instead of a description of what the end of the world is really like. Don't take it too seriously!