简述钻爆洞挖中的炮孔类型,作用及布置要求?

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问题:

简述钻爆洞挖中的炮孔类型,作用及布置要求?

考点:水利工程水利工程施工水利工程施工题库
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为庆祝建国60周年,学校举行征文比赛。每个年级选7篇作品,6个年级一共选多少篇作品?

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Jenny hopes that Mr. Smith will suggest a good way to have her written English _____ in a short period. [ ]

A. improved

B. improving

C. to improve

D. improve

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圆柱形无盖铁皮水桶的高与底面直径的比是3:2,底面直径是4分米.做这样的2只水桶要用铁皮多少平方分米?(得数保留整十平方分米)

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阅读理解

      Most people know that Marie Curie was the first woman to win the Nobel Prize, and the first

person to win it twice. However, few people know that she was also the mother of a Nobel Prize

winner.

     Born in September, 1897, Irene Curie was the first of the Curies' two daughters. Along with nine

other children whose parents were also famous scholars, Irene studied in their own school, and her

mother was one of the teachers. She finished her high school education at the College of S?vign? in

Paris.

     Irene entered the University of Paris in 1914 to prepare for a degree in mathematics and physics.

When World War I began, Irene went to help her mother, who was using X-ray facilities (设备) to

help save the lives of wounded soldiers. Irene continued the work by developing X-ray facilities in

military hospitals in France and Belgium. Her services were recognised in the form of a Military's

Medal by the French government.  

     In 1918, Irene became her mother's assistant at the Curie Institute. In December 1924, Frederic

Joliot joined the Institute, and Irene taught him the techniques required for his work. They soon fell in

 love and were married in 1926. Their daughter Helene was born in 1927 and their son Pierre five

years later.

     Like her mother, Irene combined family and career. Like her mother, Irene was awarded a Nobel

Prize, along with her husband, in 1935. Unfortunately, also like her mother, she developed leukemia

because of her work with radioactivity(辐射能). Irene Joliot-Curie died from leukemia on March 17,

1956.(www.yygrammar.com)  

1. Why was Irene Curie awarded a Military Medal?

A. Because she received a degree in mathematics.

B. Because she contributed to saving the wounded.

C. Because she won the Nobel Prize with Frederic.

D. Because she worked as a helper to her mother.

2 . Where did Irene Curie meet her husband Frederic Joliot?

A. At the Curie Institute.                

B. At the Universityof Paris.

C. At a military hospital.                

D. At the Collegeof S ?vign ?.

3. When was the second child of Irene Curie and Frederic Joliot born?

A. In 1932.                              

B. In 1927.  

C. In 1897.                              

D. In 1926.

4. In which of the following aspects was Irene Curie different from her mother?

A. Irene worked with radioactivity.

B. Irene combined family and career.

C. Irene won the Nobel Prize once  

D. Irene died from leukemia.

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对于汽车空调系统的叙述下列那一项错误?()

A.空调系统安装时,干燥瓶的配管作业应最后才作

B.液、气态冷媒的分界构件为冷凝器和蒸发器

C.压缩机上有二个工作阀刻有SUCTION或S记号的一端是接冷凝器的

D.抽真空的主要目的是要除去系统内的空气与水分

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