2017职称英语考试模全真拟试题理工类B级第二套
A. Ionosphere is high above the earth.
B. One is that the magnetic filed of the earth is much disturbed because of the sun's interference in the ionosphere which is 80 to 500 kilometers above the earth.
C. Scientists also say that the active movement of the charged sun storm also has effects on earthquakes
D. Every 11 years， the sun， as its energy accumulate inside up to a certain point， will send out streams of charged particles， which affect the earth in different ways
E. But the communication situation in each case returned to normal in about 24 hours.
F. So， scientists warn that people going outdoors should be careful to protect their exposed skin and eyes with clothes， umbrellas and sunglasses from the strong sunlight rich in ultraviolet rays.
第六部分：完型填空 （每题1分，共15分）
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上。
Dark Forces Dominate Universe
The Earth，moon，sun and all visible stars in the sky make up less than one percent of the universe.Almost all the rest is dark matter and dark energy， unknown _1_ that puzzle
astronomers.
Observations in recent years have changed the basic understanding of how the universe
evolved and have emphasized for astronomers how little is known _2_ the major forces and
substances that shaped our world.
Astronomers now know that luminous matter-stars.planets and hot gas – _3_ only about 0.4 percent of the universe.Non.1uminous components.such as black holes and intergalactic
gas，make up 3.6 percent.The rest is either dark matter， about 23 percent，or dark energy， about 73 percent.
Dark matter， sometimes called “cold dark matter，” has been known for some _4_. Only recently have researchers come to understand the pivotal role it _5_ in the formation of stars.planets and even people.
“We owe our very existence to dark matter，” said physicist Paul Steinhardt and a co-author of a review on dark matter which appeared not long _6_ in the journal Science.
Steinhardt said it is believed that following the Big Bang，the theoretical _7_ of the universe，dark matter caused particles to clump together.That set up the gravitation processes that led to the formation of stars and galaxies.Those stars，in turn，created the basic chemicals，such as carbon and iron.that were _8_ to the evolution of life.
“Dark matter dominated the formation of structure in the early universe.”Steinhardt said.“For the first few billion years dark matter contained _9_ of the mass of the universe.You can think of ordinary matter as a froth of an Ocean of dark matter.The dark matter clumps and the ordinary matter falls into it.That led to the _10_ of the stars and galaxies.”
Without dark matter，“there _11_ be virtually no structures in the universe.”
The nature of dark matter is _12_.It cannot be seen or detected _13_ .Astronomers know it is there because of its effect on celestial objects than can be seen and measured.
But the most dominating force Of _14_ in the universe is called dark energy.a recently proven power that astronomers say is causing the galaxies in the universe to separate at a faster and faster speed.
One scientist said it is clear now _15_ dark matter and dark energy engaged in a gravitational tug of war that，eventually，dark energy won.
词汇：
intergalactic／adj.银河间的 gravitation／n.地心吸力，万有引力
pivotal／adj.关键的 froth／n.泡沫
owe／v.把……归功于 celestial／adj.天体的
clump／v.凝聚成块
1. A）space B）movement C）forces D）speed
2. A）about B）in C）for D）witllin
3. A）waits for B）longs for C）accounts for D）looks for
4. A）schedule B）time C）duration D）period
5. A）displayed B）delayed C）relayed D）played
6. A）previously B）back C）before D）ago
7. A）beginning B）changing C）combining D）ending
8. A）universal B）additional C）fundamental D）structural
9. A）many B）most C）little D）few
10. A）detection B）formation C）revolution D）separation
11. A）would B）must C）shall D）should
12. A）unchecked B）unlocked C）unknown D）unmeasured
13. A）personally B）accurately C）formally D）directly
14. A）all B）total C）overall D）sum
15. A）when B）that C）how D）what
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