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The following is a passage about inventors and their inventions. New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors design a new machine or product that becomes so well-known that the invention, named after its creator, becomes a household word. Here are four famous inventors and the inventions that are named after them: 1. John Bowler, a London hatter who designed the hard round hat known as the bowler in about 1850. It has become the symbol of a respectable British man. 2. Louis Braille(1809-1952), born in France. He was blinded as a child. In 1924 he developed his own alphabet patterns known as Braille by which the blind could read by touch. 3. Rudolf Diesel(1858-1913), a German engineer who invented the diesel engine in 1897 and so began a transport revolution in cars, lorries and trains. 4. Charles Rolls, a car salesman who with the engineer Henry Royce created the world-famous Rolls-Royce car. Inventors and Their Inventions Our lives are made easier, longer, warmer and speedier by【46】A few inventions were named after their inventors. Here are some: Inventors Description Inventions John Bowler the【47】hat bowler Louis Braille his own【48】 Braille Rudolf Diesel an engine that began a transport revolution 【49】 Charles Rolls the world-famous Car 【50】car
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【简答题】若差动放大电路两输入端电压分别为 , ,则差模输入信号 为 mV ,共模输入信号为 mV 。若双端输出电压放大倍数 =10 ,则输出电压 mV 。
【单选题】在发动机滑油系统供油路上安装的最终油滤,()更换
A.
随时可以
B.
在外场维修时
C.
只能在发动机翻修
D.
不能
【单选题】在发动机滑油系统供油路上安装的最终油滤,( )更换。
A.
随时可以
B.
在外场维修时
C.
通常只能在发动机翻修时
D.
不能
【单选题】展会中遇到什么样的客户需要婉拒对方的询价( )。
A.
提供名片
B.
索要样品
C.
直接问价
D.
专业提问
【单选题】城中有两位出手阔绰的名嫒,你认为哪一位较奢侈:
A.
为纯种爱犬租下小岛,并为它举行数百万婚礼派对,邀请城中名人出席
B.
为显气派,到日本旅游时包下三层六星级酒店所有房间,自己“只”住总统套房
【判断题】“等离子体增强化学气相沉积”,是一种化学气相沉积。
A.
正确
B.
错误
【单选题】在发动机滑油系统供油路上安装的最终油滤,()更换.
A.
随时可以
B.
在外场维修时
C.
只能在发动机翻修时
D.
不能
【多选题】化学气相沉积(CVD)按照反应气压进行分类,可以分为? A B 低压化学 C 气相沉积 C D
A.
常压化学气相沉积
B.
低压化学气相沉积
C.
等离子体增强化学气相沉积
D.
高压气相沉积
【简答题】若双端输入,双端输出理想差动放大电路,两个输入电压u i1 =u i2 ,则输出电压为()V;若u i1 =1500μV,u i2 =500μV,则差模输入电压u i2 为()μV,共模输入信号u ic 为()V。
【简答题】差分放大电路,若两个输入信号为u I1 =uI2,则输出电压u O =();若u I1 =100V,u I1 =80V,则差模输入电压u Id =()V;共模输入电压u Ic =()V。
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