糖尿病发病率预测到2025年将上升至

A:1亿 B:2亿 C:3亿 D:4亿 E:5亿

LED Lighting 

1　An accidental discovery announced recently has taken LED lighting to a new level, suggesting it could soon offer a cheaper, longer-lasting alternative to the traditional light bulb. The breakthrough adds to a growing trend that is likely to eventually make Thomas Edison"s bright invention¹ obsolete.LEDs are already used in traffic lights, flashlights, and architectural lighting. They are flexible and operate less expensively than traditional lighting.

2　Michael Bowers, a graduate student² at Vanderbilt University, was just trying to make really small quantum dots, which are crystals generally only a few nanometers big. Quantum dots contain anywhere from 100 to 1,000 electrons³. They"re easily excited bundles of energy, and the smaller they are, the more excited they get. Each dot in Bowers" particular batch was exceptionally small, containing only 33 or 34 pairs of atoms.

3　When you shine a light on quantum dots or apply electricity to them, they react by producing their own light, normally a bright, vibrant color. But when Bowers shined a laser on his batch of dots, something unexpected happened. He was surprised when a white glow covered the table. The quantum dots were supposed to emit blue light⁴, but instead they were giving off a beautiful white glow.

4　Then Bowers and another student got the idea to stir the dots into polyurethane and coat a blue LED light bulb with the mix. The lumpy bulb wasn"t pretty, but it produced white light singular to a regular light bulb.

5　LEDs produce twice as much light as a regular 60 watt bulb and bum for over 50,000 hours. The Department of Energy estimates LED lighting could reduce U. S.energy consumption for lighting by 29 percent by 2025. LEDs don"t emit heat, so they"re also more energy efficient. And they"re much harder to break.

6　Quantum dot mixtures could be painted on just about anything⁵ and electrically excited to produce a rainbow of colors, including white. The main light source of the future will almost surely not be a bulb. It might be a table, a wall, or even a fork.

词汇： 

LED / ,eli:’di: / = light-emitting diode发光二极管

obsolete / ’ɒbsəli:t/ adj．过时的，被淘汰的

flashlight / ’flæʃlaɪt/ n．手电筒

architectural / ,ɑ:kɪ’tektʃərəl / adj．建筑的

quantum / ’kwɒntəm / n．量子

crystal / ’krɪstl / n．晶体

batch / bætʃ/ n．一批

vibrant / ’vaɪbrənt /adj．（颜色）鲜明的

polyurethane / ,pɒlɪ’jʊərəθeɪn, -æn / n．聚亚安酯

lumpy / ’lʌmpɪ/ adj．粗糙的

注释：

1．bright invention：聪明的发明

2．graduate student：研究生

3．Quantum dots contain anywhere from 100 to 1,000 electrons：量子点含100～1000个电子不等。anywhere是“（限定范围内的）任何一点”。又如：

His monthly salary is anywhere between 3,000 yuan to 5,000 yuan.

他的月工资在3000～5000元之间。

4．The quantum dots were supposed to emit blue light：按常规，量子点会发出蓝色光。be supposed to是“被期望（按规则、惯例）做某事”。又如：

They were supposed to have finished writing the report three days ago.

他们三天前就该写完那份报告。

B　a laser excited the quantum dots

C　America adopted LEDs

D　graduate students work hard

E　quantum dot mixtures are magic

Over one quarter of energy consumption for lighting could be saved by 2025 if ________.

A:A B:B C:C D:D E:E F:F

全区确定到2025年基本实现税收现代化的奋斗目标。

2012年10月版本完善并扩展了“2025抵现”交易的功能，增加了（）之间的抵现功能。

A:对公账户与对公账户 B:对公账户与个人账户 C:个人账户与个人账户

“2025抵现”交易目前暂不支持（）账户参与交易。

A:信用卡 B:理财金卡 C:基本户

“中国制造2025”和德国工业4.0的不同点有（）

A:中国制造业具有强大的技术基础，所以它直接实施工业4.0 B:中国在两化融合、信息化推动“互联网+”等各方面具有优势 C:中国任务比德国实现工业4.0更加复杂、更加艰巨 D:中国要实现传统产业转型升级，还要实现高端领域的跨越式发展

2025年我国GDP预计将达到：（）

A:10万亿 B:20万亿 C:22万亿 D:50万亿

为TD-SCDMA规划的三个频段分别为：（）；（）和2010-2025。

1880-1920MHz、2300-2400MHz

《中国制造2025》提出建设制造强国的基本原则有()。

A:政府主导，市场运作 B:立足当前，着眼长远 C:整体推进，重点突破 D:自主发展，开放合作 E:统筹协调，共享发展