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更多“ARM的Thumb指令集为多少位()。”相关的问题
A.宣布甲、乙当选
B.宣布甲当选，同时以乙为候选人另行选举
C.宣布甲当选，同时以乙、丙为候选人另行选举
D.宣布无人当选，以甲、乙、丙为候选人另行选举
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.
某投资项目第一年初投资1200万元，第二年初投资2000万元，第三年初投资1800万元，投资均在年初发生，其中第二年和第三年的投资使用银行贷款，年利率为12%，该项目从第三年起开始获利并偿还贷款，10年内每年年末获净利益1500万元，银行贷款分五年等额偿还，问每年应偿还银行多少万元？画出企业的现金流量图。
