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WWW是World Web Wide的缩写。()
WWW是World Web Wide的缩写。（)
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题目内容
（请给出正确答案）
A.错误
B.正确
如果结果不匹配，请 联系老师 获取答案
更多“WWW是World Web Wide的缩写。()”相关的问题
A.一个主机的域名
B.一个Web主页
C.一个主机的IP地址
D.网络协议
A.正确
B.错误
A.可通过XML(可扩展标记语言)
B.SOAP(简单对象访问协议)
C.WSDL(Web服务描述语言)
D.UDDI(通用描述发现和集成)
A.氨苄西林钠溶液的稳定性与浓度有关，浓度愈高，愈不稳定
B.本品对酸较稳定，遇水、碱均不稳定
C.氨苄西林钠具有α-氨基酸的性质
D.本品不发生双缩脲反应
E.本品为广谱半合成青霉素，主要用于尿路感染，呼吸道感染，伤寒和败血症等
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.
