圆柱螺旋弹簧具有吸收冲击能量的作用。

题型:判断题

问题:

圆柱螺旋弹簧具有吸收冲击能量的作用。

考点:钳工技能考试中级车辆钳工考试中级车辆钳工考试题库
题型:判断题

假如某物质的X线衰减系数为30,水的X线衰减系数为20,则该物质的CT值为

A.500Hu

B.600Hu

C.50Hu

D.800Hu

E.1500Hu

题型:判断题

用3厘米、4厘米、5厘米的三根小棒不能摆成一个三角形.______.

题型:判断题

尿碘测定国家标准采用的化学分析方法是()

A.分光光度法

B.电极法

C.原子吸收法

D.中子活化法

E.气相色谱法

题型:判断题
Thomas Alva Edison was an American inventor, scientist and businessman who invented many things that greatly influenced life around the world, such as the phonograph, the motion picture camera, and a long-lasting, practical electric light bulb. Edison has been recognized as the creator of the first industrial research laboratory. It is he who came up with the concept of providing electricity for home. His first power station was on Manhattan Island, New York.
Edison was born in Milan, Ohio, and grew up in Port Huron, Michigan. He was the seventh and last child of his family. When he was young, Edison stayed at home and was taught by his mother. Edison recalled later, “My mother was the making of me. She was so true, so sure of me; and I felt I had someone to live for, someone I must not disappoint.” During his childhood, he suffered from scarlet fever which affected his hearing.
Young Edison sold candy and newspapers on trains running from Port Huron to Detroit, and he sold vegetables to supplement his income. These jobs, though insignificant, inspired him greatly. He realized that he had a talent for business. These talents eventually made him founder of 14 companies, including General Electric, which is still in existence and is the largest publicly traded company in the world.
Edison started as a telegraph operator and this was the field in which he came up with the first invention. The invention which first gained him fame was the phonograph in 1877. The invention seemed magical, as nothing similar had ever been thought of before. Funded by the successful sale of the telegraph at a price of $10,000, Edison built his own research laboratory in Menlo Park, New Jersey.
The laboratory expanded rapidly over the decade. In 1892, it was confirmed that Edison was the official inventor of the carbon microphones, which was used in all telephones. Although he attempted to make use of X-rays to take radiographs, he quit the project and admitted his fear of X-rays in public.
Thomas Edison died of diabetes at his home in New Jersey, on October 18, 1931 and in honor of his contributions, Life magazine (USA), in a special double issue in 1997, placed Edison first in the list of the “100 Most Important People in the Last 1000 Years”, noting that the light bulb he promoted “lit up the world”.
Title: Thomas Edison—an influential person in the American history
Edison’s __小题1:__ to society
He invented many things that greatly influenced life around the world, _小题2:__ the phonograph, the motion picture camera, a long-lasting, practical electric light bulb and the carbon microphone.
He set up the first industrial _小题3:__ laboratory.
He put __小题4:__ the concept of providing electricity for home.
He __小题5:__ 14 companies, including General Electric, which is still in existence and is the largest publicly traded company in the world.
The life experience of Edison
He was born in Milan and was the youngest of seven children in his family.
_小题6:_ of receiving schooling, Edison was taught by his mother at home.
The scarlet fever he suffered _小题7:_ to hearing loss.
To earn a living, Edison sold newspapers, candy and vegetables, which __小题8:__ him and helped him discover his talent for business.
Later, he worked in the field of telecommunication as an telegraph operator, where he invented phonograph in 1877, which gained him great fame.
After he created his research laboratory, he __小题9:_ up the project of making use of X-rays to take radiographs due to his fear of radiation.
He died of diabetes at his home in New Jersey in 1931.
The honor given to Edison
◆  He was placed first in the list of the “100 Most __小题10:_ People in the Last 1000 Years”, noting that the light bulb he promoted “lit up the world”.
题型:判断题

句型转换。(5分)

小题1:Mike has six books. (改为否定句)

Mike ____ ____ six books.

小题2:The boy is John. (对画线部分提问)

____ the boy?

小题3:My penfriend lives in England. (对画线部分提问)

____ ____ your penfriend ____?

小题4:like, does, English, what, your, look, teacher (连词成句)

______________________________________________________________________

小题5:Helen is my friend. Amy is my friend, too.(合并为一句)

Helen and Amy ____ ____ my ____.

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