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【简答题】
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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【单选题】在Visual FoxPro中,在数据库中创建表的CREATE TABLE命令中定义主索引、实现实体完整性规则的短语是______。
A.
FOREIGN KEY
B.
DEFAULT
C.
PRIMARY KEY
D.
CHECK
【简答题】在Visual FoxPro中,在数据库中创建表的CREATE TABLE命令中定义主索引、实现实体完整性规则的短语是( )。 A)FOREIGN KEY B)DEFAULT C)PRIMARY KEY D)CHECK
【单选题】Since 1990, our customers ______with our service.
A.
are satisfied
B.
have satisfied
C.
have been satisfying
D.
have been satisfied
【多选题】下列关于兴奋的叙述,正确的有
A.
兴奋是指细胞受到刺激后所产生的反应
B.
由相对静止变为活动状态即是兴奋
C.
兴奋就是动作电位
D.
交感神经使心跳加快为兴奋作用
E.
奋性与兴奋是同义语
【简答题】5. Paul: Do you have many customers in Europe? Mr. Ortiz: No, we don't have any right now.A. They have a few customers in Europe. B. They have a lot of customers in Europe. C. They have no customers i...
【单选题】在Visual FoxPro中,在数据库中创建表的CREATE TABLE命令中定义主索引、实现实体完整性规则的短语( )。
A.
FOREIGN KEY
B.
DEFAULT
C.
PRIMARY KEY
D.
CHECK
【判断题】已知 , =0.16V。从两电对的电势来看,下列反应: 应该向左进行。
A.
正确
B.
错误
【简答题】To dispose of a ton of trash in a landfill, customers have to pay a tipping fee of __________.
【简答题】在Visual FoxPro中,在数据库中创建表的CREATE TABLE命令中定义主索引、实现实体完整性规则的短语是( )。 A)FOREIGN KEY B)DEFAULT C)PRIMARY KEY D)CHECK
【单选题】已知Eθ(I2/I-) = 0.54V, Eθ(Cu2+/Cu+) = 0.16V。从两个电对的标准电极电势来看,下列反应2Cu2+ + 4I- = 2CuI + I2应该向左进行,而实际上该反应自发向右进行,其主要原因是
A.
由于生成的 CuI 是稳定的配合物 ,使 Cu2+/Cu+ 电对的电极电势升高
B.
由于生成的 CuI 是难溶化合物,使 Cu2+/Cu+ 电对的电极电势升高
C.
由于 I 2 难溶于水,促使反应向右
D.
由于 I2 有挥发性,促使反应向右
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