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It has been necessary to refer repeatedly to the effects of the two world wars in promotin

g all kinds of innovation. It should be【C1】______ also that technological innovations have【C2】______ the character of war itself by the【C3】______ of new mechanical and chemical devices. One weapon developed【C4】______ World War II deserves a special mention. The【C5】______ of rocket propulsion (推进力) was wellknown earlier, and its possibilities as a 【C6】______ of achieving speeds sufficient to escape from the Earth's gravitational (引力的) pull had been【C7】______ out by the Russian and the American scientists. The【C8】______ built an experimental liquid-fuelled rocket in 1926.【C9】______ , a group of German and Romanian pioneers was working across the same lines, and in the 1930s, it was this team that developed a rocket【C10】______ of delivering a warhead hundreds of miles away. Reaching a height of over 100 miles, the V-2 rocket【C11】______ the beginning of the Space Age, and members of its design team were【C12】______ in both the Soviet and United States space programs after the war. Technology had a tremendous social【C13】______ in the period 1900—1945. The automobile and electric power, on the other hand, radically changed both the scale and the quality of 20th-century life,【C14】______ a process of rapid urbanization and a virtual revolution【C15】______ living through mass production of household goods and【C16】______ . The rapid development of the airplane, the cinema,【C17】______ radio made the world seem suddenly smaller and more【C18】______ . The development of many products of the chemical industry further transformed the life of【C19】______ people. In the years following 1945 the constructive and creative opportunities of modern technology could be exploited,【C20】______ the process has not been without its problems.

【C1】

A.observed

B.notified

C.commented

D.detected

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更多“It has been necessary to refer repeatedly to the effects of the two world wars in promotin”相关的问题

第1题

All the crew _____ saved.A.wasB.wereC.hasD.has been

A.was

B.were

C.has

D.has been

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第2题

_____ has been called the father of American poetry.

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第3题

There has been a large (grow) ______ of light industries during these years.

There has been a large (grow) ______ of light industries during these years.

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第4题

The question ()we need has not yet been considered.A、whatB、that

The question ()we need has not yet been considered.

A、what

B、that

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第5题

When I arrived at the cinema, the movie ___ for ten minutes.

A.has begun

B.had begun

C.had been on

D.has been on

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第6题

The old______treated badly in some countries.

A.is

B.are

C.was

D.has been

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第7题

Even though there has been a ()with child prodigies for centuries, there has been litt
Even though there has been a ()with child prodigies for centuries, there has been litt

le serious study of them until recently.

A.facility

B.fascination

C.faculty

D.assassmation

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第8题

As a news reporter, James __________ many places in the world.A. has been toB. has gone

As a news reporter, James __________ many places in the world.

A. has been to

B. has gone to

C. went to

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第9题

Every boy and girl ______ to come to class at once.

A.have been told

B.has been told

C.have told

D.has told

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第10题

The boy()to school already.

A、has taken

B、has been taking

C、is taken

D、has been taken

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