Inventor of LED When Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light-emitting diodes, or LEDs, are used in everything from DVDs to alarm clocks to airports. Dozens of his students have continued his work, developing lighting used in traffic lights and other everyday technology. On April 23, 2004, Holonyak received the $ 500,000 Lemelson-MIT Prize at a ceremony in Washington. This marks the 10th year that the Lemelson-MIT Program at the Massachusetts Institute of Technology (MIT) has given the award to prominent inventors. "Anytime you get an award, big or little, it’s always a surprise. " Holonya [单项选择]在Access中, (66) 不属于数据表的复制方式。
A. 表结构的复制 B. 记录的复制 C. 结构与记录同时复制 D. 选择字段的复制 [单选题]在WINDOWS 环境中,若在桌面上同时打开多个窗口, 则下面关于活动窗口(即当前窗口)的描述中,( )是不正确的。
A.活动窗口的标题栏是高亮度的 B.可移动在屏幕上的位置 C.活动窗口在任务栏上的按钮为按下状态 D.桌面上可以同时有两个活动窗口 [多选题]农村合作金融机构重大事项报告的范围包括:()
A.联社(合行)本部重大突发性事件 B.联社(合行)各级营业机构重大突发性事件 C.高级管理人员重大事件 D.突发性事件 [判断题]依据《安全生产法》的规定,两个以上生产经营单位在同一作业区域进行生产经营活动,可能危及对方生产安全的,应当签定安全生产管理协议,明确各自的安全生产管理职责和应当采取的安全措施。
A.正确 B.错误 [单项选择]What he has done is far from______.
A. satisfactory B. satisfied C. satisfaction D. satisfy [单项选择]西蒙指出了可以用来比较程序性和非程序性决策过程的四个阶段,他把评价以往的选择称为()
A. 情报活动 B. 设计活动 C. 抉择活动 D. 审查活动 [单选题]在经济萧条时期,由于国内需求不足,进出口业务会发生相应的变动,则国际收支可能出现()。
A.平衡 B.逆差 C.不确定 D.顺差 [判断题]离洋中脊越近,深海沉积物年龄越老。
[单选题]当调车作业能进入接发旅客列车进路时,准许( )作为隔开设备使用。
A.防护道岔 B.安全线 C.避难线 D.有联锁的脱轨器 [单选题]用示波器测得单相半波整流电容滤波输出的波形为( )。
A.三角波 B.锯齿波 C.平滑的一条直线 D.正弦波 [单选题]高层民用建筑高度在100m以下时,要求消火栓系统最不利消火栓处充实水柱不得小于 ( )
A.10m B.20m C.30m D.35m [单选题]作业人员应具备必要的安全生产知识,学会紧急救护法,特别要学会( ) 。
A.触电急救 B.人工呼吸 C.止血救护 [单选题]设备或障碍物侵入线路()时,禁止调车作业。
A.设备限界 B.建筑限界 C.机车限界 D.车辆限界 [简答题]塚 简述YB25包装机“商标纸能效检测”的显示条件、产生的原因及排障措施。
[判断题]在列管换热器中,若用饱和蒸气加热空气,则传热管的壁温接近饱和蒸气的温度.
A.正确 B.错误 [单选题]在高温场所,作业人员出现体温在39℃以上,突然昏倒,皮肤干热.无汗等症状,应该判定其为( )。
A.感冒 B.重症中暑 C.中毒 D.高血压 [填空题]
阅读下面这篇短文,短文后有2项测试任务;(1)第23~26题要求.从所给的6个选项中为第2~5段每段选择1个正确的小标题;(2)第27~30题要求从所给的6个选项中选择4个正确选项,分别完成每个句子。
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1 If someone says to you your music CDs don’t really hold any music on them, and they only have numbers recorded on them, you may not believe it. In fact, he is right in that sound is actually recored onto the CDs as special numbers --a digital code. The code is pressed onto the CD as bumps on a long spiral track almost five kilometers long. These bumps are an average of 0.5 microns wide. 2 A small laser beam shines onto the bumps as the CD turns. The light is reflected back to a receiver that records how the laser light bounces back. This lets the CD player turn the reflected light back into the original code. This means you can hear the original code as music. 3 Digital codes are used with many technologies. E-mail needs these kinds of code numbers. Spac [单选题]资本金账户资金()以现钞存入。
A.不得 B.可以 C.凭外汇局批准件 我来回答: 提交
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