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【单选题】
用折射率为1.50的玻璃制成的为-4.00DS的平凹透镜,则该镜片凹面的曲率半 径为( )。
A.
100mm
B.
200mm
C.
500mm
D.
125mm
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参考答案：
举一反三
【单选题】What's the most way of building a bridge.
A.
economic
B.
economical
C.
economy
D.
economically
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【单选题】设有以下说明语句： 则下面的叙述中不正确的是（ ）。
A.
struct结构体类型的关键字
B.
example是结构体类型名
C.
x，y，z都是结构体成员名
D.
struet ex是结构体类型名
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【简答题】Fujian Tulou is a special type of Chinese building. People built most of them between the 12th and the 20th century. The oldest one has a history of more than 1,000 years. Tulou is usually a large rec...
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【判断题】P23-30 is the most moving part of the story, which tells us how, in the most dangerous momnet when the heavyset man was completely exhausted, Ramos and Hong still persisted in helping him out of the b...
A.
正确
B.
错误
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【单选题】系统生命曲线婴儿期的特点是()。
A.
价值和潜力显现,大量的人、物、财力的投入,效率和性能得到提高,吸引更多的投资,系统高速发展
B.
效率低,可靠性差,缺乏人、物、财力的投入,系统发展缓慢
C.
系统日趋完善,性能水平达到最佳,利润最大并有下降趋势,研究成果水平较低
D.
技术达极限,很难有新突破,将被新的技术系统所替代,新的曲线开始
查看完整题目与答案
【单选题】系统生命曲线婴儿期的特点是( )
A.
值和潜力显现，大量的人､物､财力的投入，效率和性能得到提高，吸引更多的投资，系统高速发展
B.
价效率低，可靠性差，缺乏人､物力的投入，系统发展缓慢
C.
系统日趋完善，性能水平达到最佳，利润最大并有下降趋势，研究成果水平较低
D.
无
查看完整题目与答案
【单选题】Which is the following excerpt most likely taken from? The hills across the valley of the Ebrol were long and white. On this side there was no shade and no trees and the station was between two lines ...
A.
a short story
B.
a news report
C.
a geography textbook
D.
a casual conversation
查看完整题目与答案
【判断题】LEED is one of the most popular green building certification programs in the world.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Hydrogen is one of the most important element in the universe ____it provides the building blocks from which the other elements are produced
A.
so that
B.
but that
C.
provided that
D.
in that
查看完整题目与答案
【单选题】设有以下说明语句 struct ex {int X；float y；char z；}example； 则下面的叙述中不正确的是
A.
struct结构体类型的关键字
B.
example是结构体类型名
C.
x，y，z都是结构体成员名
D.
struct ex是结构体类型名
查看完整题目与答案
相关题目：
【单选题】What's the most way of building a bridge.
A.
economic
B.
economical
C.
economy
D.
economically
查看完整题目与答案
【单选题】设有以下说明语句： 则下面的叙述中不正确的是（ ）。
A.
struct结构体类型的关键字
B.
example是结构体类型名
C.
x，y，z都是结构体成员名
D.
struet ex是结构体类型名
查看完整题目与答案
【简答题】Fujian Tulou is a special type of Chinese building. People built most of them between the 12th and the 20th century. The oldest one has a history of more than 1,000 years. Tulou is usually a large rec...
查看完整题目与答案
【判断题】P23-30 is the most moving part of the story, which tells us how, in the most dangerous momnet when the heavyset man was completely exhausted, Ramos and Hong still persisted in helping him out of the b...
A.
正确
B.
错误
查看完整题目与答案
【单选题】系统生命曲线婴儿期的特点是()。
A.
价值和潜力显现,大量的人、物、财力的投入,效率和性能得到提高,吸引更多的投资,系统高速发展
B.
效率低,可靠性差,缺乏人、物、财力的投入,系统发展缓慢
C.
系统日趋完善,性能水平达到最佳,利润最大并有下降趋势,研究成果水平较低
D.
技术达极限,很难有新突破,将被新的技术系统所替代,新的曲线开始
查看完整题目与答案
【单选题】系统生命曲线婴儿期的特点是( )
A.
值和潜力显现，大量的人､物､财力的投入，效率和性能得到提高，吸引更多的投资，系统高速发展
B.
价效率低，可靠性差，缺乏人､物力的投入，系统发展缓慢
C.
系统日趋完善，性能水平达到最佳，利润最大并有下降趋势，研究成果水平较低
D.
无
查看完整题目与答案
【单选题】Which is the following excerpt most likely taken from? The hills across the valley of the Ebrol were long and white. On this side there was no shade and no trees and the station was between two lines ...
A.
a short story
B.
a news report
C.
a geography textbook
D.
a casual conversation
查看完整题目与答案
【判断题】LEED is one of the most popular green building certification programs in the world.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Hydrogen is one of the most important element in the universe ____it provides the building blocks from which the other elements are produced
A.
so that
B.
but that
C.
provided that
D.
in that
查看完整题目与答案
【单选题】设有以下说明语句 struct ex {int X；float y；char z；}example； 则下面的叙述中不正确的是
A.
struct结构体类型的关键字
B.
example是结构体类型名
C.
x，y，z都是结构体成员名
D.
struct ex是结构体类型名
查看完整题目与答案
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