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A.number
B.amount
C.piece
D.kind
答案
更多“We need a huge _____ of money to build a new high school for the children in this area.”相关的问题
第1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2题
A.appearance
B.application
C.accomplish
D.achievement
第3题
A.facilities
B.hens
C.votes
D.artists
第4题
A、after all
B、at any rate
C、all along
D、as a result
第5题
A.should have gone
B.need have gone
C.ought to have gone
D.must have gone
第6题
A.在得到我们的答复之前，你必须向你原来的老板去索要一份证明函。
B.我们给你答复的前提是，你以前的老板愿意向我们提供一份推荐函。
C.我们需要你以前的雇主提供一份推荐函，然后才能给你明确的答复。
D.我们给你的答复是，你向以前的老板索取一份肯定你工作的证明信。
第7题
A.错误
B.正确
第8题
A、need to not go
B、need not to go
C、need not go
D、do not need go
第9题
A、deposit
B、council
C、desired
D、submitted
