The _____ power of the people in this town has been decreasing because most young people have left for the big cities.
A.shopping
B.enduring
C.purchasing
D.spending
A.shopping
B.enduring
C.purchasing
D.spending
第1题
A.Their power increased with their number.
B.As the increse of the number, their power is increased.
第2题
A.正确
B.错误
第3题
A.store
B.secure
C.provide
D.ensure
第4题
A) granted B) implied C) exaggerated D) remedied
第5题
A、worthy
B、virtual
C、universal
D、indefinite
第6题
ngerprint files to match a print at a crime ______.
A) stage B) scene C) location D) occasion
第7题
A.bears
B.horses
C.monkeys
D.foxes
第8题
A.Indian
B.Australian
C.American
D.Russian
第9题
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.
第10题
A.It is the oldest institution of government.
B.It goes back to at least the 9th century.
C.It has maintained the continuity over the past thousand years.
D.It seems that it enjoys no real power today.