2021年职称英语考试《综合类》考试共65题，分为单选题。小编每天为您准备了5道每日一练题目（附答案解析），一步一步陪你备考，每一次练习的成功，都会淋漓尽致的反映在分数上。一起加油前行。

1、If headaches on[y occur at night, lack of fresh air is often the cause.【单选题】

A.start

B.begin

C.happen

D.visit

正确答案:C

答案解析:题干大意：如果只晚上头疼，大多是由于无法呼吸到新鲜空气所致。画线词occur意为“发生”。happen：发生；begin：开始；start：开始，start和begin是可以相互替代的；visit：参观。故答案为C。

2、The Beginning of American LiteratureAmerican has always been a land of beginnings. After Europeans "discovered" America in the fifteenth century, the mysterious New World became for many people a genuine hope of a new life, an escape from poverty and persecution, a chance to start again. We can say that, as nation, America begins with that hope. When, however, does American literature begin?American literature begins with American experiences. Long before the first colonists arrived, before Christopher Columbus, before the Northmen who "found" America about the year 1,000, Native Americans lived here. Each tribe\'s literature was tightly woven into the fabric of daily life and reflected the unmistakably American experience of lining with the land. Another kind of experience, one filled with fear and excitement, found its expression in the reports that Columbus and other explorers sent home in Spain, French and English. In addition, the journals of the people who lived and died in the New England wilderness tell unforgettable tales of hard and sometimes heartbreaking experiences of those early years.Experience, then, is the key to early American literature. The New World provided a great variety of experiences, and these experiences demanded a wide variety of expressions by an even wider variety of early American writers. These writers included John Smith, who spent only two-and-a-half years on the American continent. They included Jonathan Edwards and William Byrd, who thought of themselves as British subjects, never suspecting a revolution that would create a United States of America with a literature of its own. American Indians, explorers, Puritan ministers, frontier wives, plantation owner-they are all the creators of the first American literature.What does "that hope" in the first paragraph refer to?【单选题】

A.The hope that America would be discovered.

B.The hope to start a new life.

C.The hope to see the mysteries of the New World.

D.The hope to find poverty here.

正确答案:B

答案解析:这里的that hope就是指上一句中的a genuine hope ofa new life。

3、Jack packed up all the things he had accumulated over the last ten years.【单选题】

A.future

B.far

C.past

D.near

正确答案:C

答案解析:杰克把过去10年里攒的所有东西都收拾好打行李了。本题难度不大，干扰项干扰不强，是送分题。last和past都指“过去的”是同义词，最佳答案是C。

4、What kinds of products were sold in this shop?【单选题】

A.goods

B.services

C.machines

D.contents

正确答案:A

答案解析:products和goods都表示“商品、货物”；service：服务；machine:机器，这是一种具体的产品，但题目中是一个泛指的词；contents：内装物品，表示这个意思时，必须写为复数。

5、What Is the Coolest Gas in the Universe?What is the coldest air temperature ever recorded on the Earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was -91℃ which occurred in Antarctica in 1983.We encounter an interesting situation when we discuss temperatures in space Temperatures in Earth orbit actually range from about +120℃ to -120℃. The temperature depends upon whether you are in direct sunlight or shade, Obviously, -120℃ is colder than our body can safely endure. Thank NASA science for well-designed space suits that protect astronauts from these temperature extremes.The space temperatures just discussed affect only our area of the solar system . Obviously, it is hotter closer to the Sun and colder as we travel away from the Sun. Astronomers estimate temperatures at Pluto are about -210℃. How cold is the lowest estimated temperature in the entire universe? Again, it depends upon your location. We are taught it is supposedly impossible to have a temperature below absolute zero, which is -273℃, at which atoms do not move. Two scientists, whose names are Cornell and Wieman, have successfully cooled down a gas temperature barely above absolute zero. They won a Nobel Prize in Physics in 2001 for their work not a discovery in this car.Why is the two scientists\' work so important to science?In the 1920s, Satyendra Nath Bose was studying an interesting _____ about particles we now call photons. Bose had trouble convincing Other scientists to believe so he contacted Albert Einstein. Einstein\'s calculations helped him theorize would behave as Bose thought but only at very cold temperatures.Scientists have also discovered that ultra-cold atoms can help them make the world\'s atomic clocks even more accurate. These clocks are so accurate today they would only lose one second every six million years! Such accuracy will help us travel in space because distance is velocity times time(d=vxt). With the long distances involved in space travel to know time as accurately as possible to get accurate distance.【单选题】

A.invention

B.theory

C.paper

D.experiment

正确答案:B

答案解析:本段第2句说，Bose没有办法使其他的科学家believe his theory，所以第1句的studying an mterestmg之后缺失的词应该是theory。