古琴弹奏方法
河北省高考英语试卷2017
河北省高考英语试卷2017
海洋管理
(C)
Fed up with constantly having to recharge or replace batteries in your ever-expanding electronic devices? The solution may be just a few steps away.
“Energy harvesting” promis to power countless consumer devices, often with nothing more than your body’s movement or heat. Dozens of companies around the world already offer such products, but many experts believe the market for the technology could explode due to electronic devices being developed for the Internet of Things.
“It’s huge,” said Graham Martin, CEO of the EnOcean Alliance, a San Ramon-bad group of business that promotes wireless energy-harvesting technologies. With the Internet of Things expected to combine billions of devices, “if they are all battery-powered, we’ll have a problem becau there’s not enough lithium (锂) in the world,” he added. “So a lot of them
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will have to u energy harvesting.”
Among the most basic forms of the technology is body power. When certain materials are squeezed or stretched, the movement of their atoms creates an electrical charge. Automatic watches have employed the concept for decades, for example, by winding themlves when their ur moves their arm. Now, the concept is being considered for a number of other devices.
In a contest eking visionary ideas for wearable technologies, Intel awarded $5,000 for a concept to change the temperature difference between a person’s body and a special piece of clothing they’d wear into electricity for mobile devices.
Using sound to power devices is another energy-harvesting variation. Stanford University engineers are testing smart microchips (芯片) that create electricity from ultrasound (超声波) to power implantable (可植入的) devices that can analyze a person’s nervous system or treat their dias.
A textile (纺织品) rearch association in Spain is proposing to obtain electricity from radio waves that flow around everyone to power nsors wn into clothes, which can monitor a person’s heartbeat or other vital signs.
Rearch firm IDTechEx has estimated that annual global sales of energy-harvesting products could hit $2.6 billion by 2024, while WinterGreen Rearch predicts sales of $4.2 billion by 2019.replace是什么意思
Obtaining stable energy from devices can be complex, however. For one thing, the motion that generates the electricity has to be constant to be uful. Moreover, the amount of power the devices produce depends on the person using them, according to a Columbia University study. It determined that taller people on average provide about 20 percent more power than shorter ones when walking, running or cycling.
It’s also unclear how eagerly consumers might welcome energy-harvesting products. While such devices are expected to cost less than battery-powered alternatives when compared over many years, experts say, people may continue buying ones with batteries
merely becau tho would be cheaper in the short term.
74. Which “explode” in the following ntences has the most similar meaning to the word “explode” in Paragraph 2?
A. They were clearing up when the cond bomb exploded.
自信的秘密
B. The continued tension could explode into more violence.
C. The population exploded to 40,000 during the last tourist ason.
D. The boss exploded when he heard of the resignation of the cretary.
75. What makes “energy harvesting” necessary according to the passage?
A. The waste of lithium in the world. B. The increasing number of electronic devices.
C. The development of technology. D. The pollution caud by batteries.
76. It can be learned from the passage that _____.
A. energy-harvesting products save money in the long run
B. taller people can surely produce a larger amount of power
C. automatic watches harvest energy from the urs’ body heat
D. two ways of harvesting energy are mentioned in the passage
77. Which of the following might be the best title for the passage?
A. Energy harvesting: a low-risk technology
B. Energy harvesting: a high-profit technology惊动的意思
C. Energy harvesting: a problem-free technology
去除法令纹D. Energy harvesting: an environment-friendly technology
Section C
Directions: Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words.句读之不知的之
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