单选题 Many are aware of the tremendous waste of energy in our environment, but fail to take advantage of straightforward opportunities to conserve that energy. For example, everyone knows that lights should be switched off when no one is in an office. Similarly, when employees are not using a meeting room, there is no need to regulate temperature. Fortunately, one need not rely on human intervention to conserve energy. With the help of smart sensing and network technology, energy conservation processes such as turning off lights and adjusting temperature can be readily automated. Ultimately, this technology will enable consumers and plant managers to better identify wasteful energy use and institute procedures that lead to smarter and more efficient homes, buildings and industrial plants.
Until now, wires and cables for power and connectivity have limited the widespread adoption of sensor (传感器) networks by making them difficult and expensive to install and maintain. Battery-powered wireless networks can simplify installation and reduce cost. But their high power consumption and the corresponding need for regular battery replacement has made wireless networks difficult and costly to maintain. Nobody wants to replace hundreds or thousands of window sensor batteries in a large building on a regular basis.
The promise of wireless sensor networks can only be fully realized when the wiring for both the data communication and the power supply is eliminated. Doing so requires a true battery-free wireless solution, one that can utilize energy harvested directly from the environment. To facilitate the widespread deployment of wireless sensor networks, Green Peak has developed an ultra-low-power communication technology that can utilize environmental energy sources such as light, motion and vibration. This technology, employing on-board power management circuits and computer software to monitor energy harvesters and make the best use of harvested energy, enables sensors to operate reliably in a battery-free environment.
Wireless sensor networks deployed in our offices and homes will have an enormous impact on our dally lives, helping to build a smarter world in which energy is recycled and fully utilized. These wireless platforms, equipped with advanced sensing capability, will enable us to better control our lives, homes and environments, creating a truly connected world that enables people worldwide to live in a more comfortable, safer, and cleaner environment.

单选题 Batteries are not an ideal energy source for sensor networks because they ______.

【正确答案】 D

【答案解析】[解析] 细节题。利用题干关键词可以定位第二段“Battery-powered wireless networks can simplify installation and reduce cost. But their high power consumption and the corresponding need for regular battery replacement has made wireless networks difficult and costly to maintain”，即“由电池供电的无线网络可以简化安装设置和减少花销。但是大功率消耗和相应的定期更换电池的需要，使得无线网络维持运转比较困难并且费用更多”，由此可知电池因为需要定期更换导致维护成本很高，所以不是理想的能源，因而答案为D。(but/however等转折关系结构经常为命题的重点所在)

单选题 Battery-free wireless sensor networks are made possible by the fact that ______.

【正确答案】 B

【答案解析】[解析] 细节题。利用题干关键词可以定位到第三段“The promise of wireless sensor networks can only be fully realized when the wiring for both the data communication and the power supply is eliminated. Doing so requires a true battery-free wireless solution, one that can utilize energy harvested directly from the environment”，即“无线传感器网络要得到充分实现，就得淘汰提供数字通讯和能量供应的电线。要想做到这点的话就得找到真正的无需电池的无线解决方法，即直接使用来自于所处环境中的能源”，原文中的“utilize energy harvested directly from the environment”与“energy in the environment to be utilized”为同义改写，因而本题答案为B。

单选题 According to the passage, Green Peak ______.

【正确答案】 A

【答案解析】[解析] 细节题。利用题干关键词可以定位到第三段“To facilitate the widespread deployment of wireless sensor networks, Green Peak has developed an ultra-low-power communication technology that Can utilize environmental energy sources such as fight, motion and vibration”，即“为了使推广无线传感器网络更容易，Green Peak已研制出了一种超低能量通信技术，它能够利用光、运动和振动这样的环保能源”，由此可知A项(推动无线感应网络的应用)是正确的，其中原文中的“facilitate the deployment”与选项中的“promote the application”为同义改写；B项原文没有提及；C项(提供了利用被采集的能源的电池)与原文不符，无线感应网络是无需电池和电线的；D项(获益于通讯技术)与“developed an ultra-low-power communication technology(发明了一种低功率的通讯技术)”也不相符。

单选题 The focus of Paragraph 3 is on the ______.

【正确答案】 D

【答案解析】[解析] 段落主旨题。从第三段的首尾句来看，这段主要谈论淘汰使用电池的问题，如首句讲到“无线传感器网络的潜能要得到充分实现，就得淘汰数字通讯和能量供应所使用的电线”，但是第二句接着说“要想做到这点的话就得找到真正的无需电池的无线解决方法”，而该段的最后一句讲到“这个技术采用附带电源管理电路和计算机软件来监控能源的收集，且最有效地利用采集到的能源，使传感器在无需电池的环境中得以应用”，由此可知本段关注无线感应网络如何在无需电池的情况下获得所需的能源，因而本题的答案为D，其他选项A(采集器中电池的更换)，B(检测从所处环境中采集的能源)，C(感应网络对能源供给的影响)不是本段论述的重点。(段落的主旨与文章的主旨一样都需要利用段落的首尾句和高频核心词汇)

单选题 Wireless sensor networks promise to ______.

【正确答案】 C

【答案解析】[解析] 细节题。题干关键词wireless sensor networks在短文中是个高频词汇，因此不适宜作为定位关键词。这里可以利用题目顺序与段落顺序一致的原则解题，上一题题考查的是第三段，因而本题应该是定位到第四段；如果题干不好定位，可以利用选项定位。分别定位四个选项后，可以定位到第四段“Wireless sensor networks deployed in our offices and homes will have an enormous impact on our daily lives”，即“无线传感器网络在办公室和家中的应用将对日常生活有很大的影响”，其中原文的“have an enormous impact on our daily lives”与选项中的“improve the daily lives”为同义改写，因而本题的正确答案为C。(高频词汇不适宜做定位关键词)了一种超低能量通信技术，它能够利用光、运动和振动这样的环保能源”，由此可知A项(推动无线感应网络的应用)是正确的，其中原文中的“facilitate the deployment”与选项中的“promote the application”为同义改写；B项原文没有提及；C项(提供了利用被采集的能源的电池)与原文不符，无线感应网络是无需电池和电线的；D项(获益于通讯技术)与“developed an ultra-low-power communication technology(发明了一种低功率的通讯技术)”也不相符。