题目内容
（请给出正确答案）
A.expose
B.commit
C.pose
D.transport
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将英语短文译为中文
3 Self-Powered Nanotech (10分)
Nanosize machines need still tinier power plants
By Zhong Lin Wang
The watchmaker in the 1920s who devised the self-winding wristwatch was on to a great idea: mechanically harvesting energy from the wearer’s moving arm and putting it to work rewinding the watch spring.
Today we are beginning to create extremely small energy harvesters that can supply electrical power to the tiny world of nanoscale devices, where things are measured in billionths of a meter. We call these power plants nanogenerators. The ability to make power on a minuscule scale allows us to think of implantable biosensors that can continuously monitor a patient’s blood glucose level, or autonomous strain sensors for structures such as bridges, or environmental sensors for detecting toxins — all running without the need for replacement batteries. Energy sources are desperately needed for nanorobotics, microelectromechanical systems (MEMS), homeland security and even portable personal electronics. It is hard to imagine all the uses such infinitesimal generators may eventually find.
In Brief
★Nanotechnology has huge potential — but those minuscule devices will need a power source that is better than a battery.
★ Waste energy, in the form. of vibrations or even the human pulse, could provide sufficient power to run such tiny gadgets.
★ Arrays of piezoelectric nanowires could capture and transmit that waste energy to nanodevices.
★ Medical devices will likely be a major application. A pacemaker’s battery could be charged so it would not need replacing, or implanted wireless nanosensors could monitor blood glucose for diabetics.
What is the purpose of the approved plan？
A．To warn people of emergencies via messages.
B．To popularize the use of cell phones.
C．To estimate the monthly number of messages.
D．To promote the wireless industry.
A、错误
B、正确
A、off
B、of
C、out
D、forth
The 3M Company rewarded employees for______.
A．helping prevent waste and pollution
B．ideas that would increase its profits
C．successful strategies for marketing
D．improving product differentiation
Companies that take measures to reduce waste and pollution______.
A．are more productive
B．are less successful
C．save money
D．spend more money
A、collect
B、ask
C、commit
D、confirm
A、warns
B、warned
C、is warned
D、was warned
A．There are too many programs for grown ups on TV.
B．Reading advertisements is a waste of time.
C．Watching TV may hurt children's eyes.
D．Some electronic equipment may cause social problems.
