2023年职称英语考试《理工类》考试共65题，分为单选题和多选题和判断题和计算题和简答题和不定项。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、Black HolesMost scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密).This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist, they are difficult to observe. These are the reasons,?No light ｏｒanything else comes out of black holes. As a result, they are invisible to a telescope.?In astronomical terms, black holes are truly. Fｏｒexample, a black hole formed by the collapse of a giant star would have an event horizon (视界) only 18 miles across.?The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe. (2007年)Black holes are part of space.【单选题】

A.Right

B.Wrong

C.Not mentioned

正确答案:A

答案解析:题干大意：黑洞是太空的一部分。用space回到原文定位，文中首段第三句提到：astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密). 天文学家认为黑洞的中心是太空中的一个单一的无限密度的点。第二段第一句也有信息提到：This single point is called a singularity (奇点). 这个单一的点叫做奇点。故答案选A。

2、Black HolesMost scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密).This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist, they are difficult to observe. These are the reasons,?No light ｏｒanything else comes out of black holes. As a result, they are invisible to a telescope.?In astronomical terms, black holes are truly. Fｏｒexample, a black hole formed by the collapse of a giant star would have an event horizon (视界) only 18 miles across.?The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe. (2007年)The center of a black hole is empty.【单选题】

A.Right

B.Wrong

C.Not mentioned

正确答案:B

答案解析:题干大意：黑洞的中心是空的。用中心词the center来定位，首段最后一句提到：at the center of a black hole there is a single point in space with infinite (无限的) density (稠密). 黑洞的中心是太空中的一个单一的无限密度的点。所以说其中心不是一个洞，由此证明黑洞的中心不是空的，故答案选B。

3、The orangutanAmong all the animals, the ape is most like human beings. Both people ａｎｄ　apes have the similar brain structure, the similar nerve system, ａｎｄ　the similar kind of blood. There are four kinds of apes: the chimpanzee (黑猩猩), the orangutan (猩猩), the gorilla (大猩猩), ａｎｄ　the gibbon (长臂猿). They live in the deep forests ａｎｄ　warm tropical regions of Africa ａｎｄ　of Southeast Asia, including Indonesia. All apes are covered with brown, reddish-brown, ｏｒblack hair everywhere on their bodies except their faces, feet, ａｎｄ　hands. Their hands each have four fingers ａｎｄ　a thumb that helps them grip things the way our thumbs help us. But they also have a thumb on each foot instead of a big toe. Thus they can hold things with their feet also. Having short, weak legs, apes do not walk on the ground very much. However, their arms are very strong. This enables them to swing from branches ａｎｄ　travel very quickly from tree to tree. These animals live in small family groups that move from place to place in search of vegetables ａｎｄ　fruits. They also eat eggs, small animals, nuts, ａｎｄ　insects. When they are tired, they build nests in the trees. But they rarely sleep there fｏｒmore than a night ｏｒtwo. Then they move on to look fｏｒmore food. There are some differences among the following three kids of apes. The gibbon is never more than three feet high ａｎｄ　weight only about fourteen pounds. The gorilla grows to be six feet tall ａｎｄ　weight up to 600 pounds. The orangutan is smaller than the gorilla. It stands three to five feet tall ａｎｄ　weight up to 200 pounds. Chimpanzees are the smartest of all apes. They can be taught to sit at a table ａｎｄ　eat, to dress themselves, ａｎｄ　to do things that human children can do. Apes build nests in the trees but seldom sleep there fｏｒmore than a night ｏｒtwo because____. 【单选题】

A.they like to live in small family groups

B.they like to move from place to place in search of more food

C.they like to eat eggs, small animals, nuts ａｎｄ　insects

D.it rains too often in the deep forests

正确答案:B

答案解析:文章第4段指出，猿四处迁居以寻找蔬菜与水果，它们累了就在树上造窝，偶尔在窝里休息一两个晚上，然后继续迁移以找到更多的食物，所以B正确。

4、I\'d very much like to know what your aim in life is.【单选题】

A.thought

B.idea

C.goal

D.plan

正确答案:C

答案解析:我很想知道你的人生目标是什么。本题有一定难度，虽然选项都是常用词汇，但干扰项干扰较大。aim和goal都有“目标”的意思，是近义词，A项指“思想”，B项指“想法”，D项指“计划”，最佳答案是C。

5、Genetically Modified FoodEuropean ｕｎｉｏｎenvironmental officials have determined that two kinds of genetically modified corn could harm butterflies, affect food chains ａｎｄ　disturb life in rivers ａｎｄ　streams, ａｎｄ　they have proposed a ban on the sale of the seeds, which are made by Dupont Pioneer, Dow Agrosciences ａｎｄ　Syngenta. The preliminary decisions are circulating within the European Commission, which has the final say. Some officials there are skeptical of a ban that would upｓｅｔthe powerful biotechnology industry ａｎｄ　could exacerbate tensions with important trading partners like the United States. The seeds are not available on the European market fｏｒcultivation.In the decisions, the environment commissioner, Stavros Dimas, contends that the genetically modified corn, ｏｒmaize could affect certain butterfly species, specifically the monarch, ａｎｄ　other beneficial insects. Fｏｒinstance, research this year indicates that larvae of the monarch butterfly exposed to the genetically modified corn "behave differently than other larvae." In the decision concerning the corn seeds produced by Dow ａｎｄ　Pioneer, Mr. Dimas calls "potential damage on the environment irreversible." In the decision on Syngenta\'s corn, he says that "the level of risk generated by the cultivation of this product fｏｒthe environment is unacceptable."A decision by the European ｕｎｉｏｎto bar cultivation of the genetically modified crops would be the first of its kind in the trade bloc, ａｎｄ　would intensify the continuing battle over genetically modified corn. Banning the applications fｏｒcorn crops also would mark a bold new step fｏｒEuropean environmental authorities, who are already aggressively pursuing regulations on emissions from cars ａｎｄ　aircraft, setting it at odds with the United States ａｎｄ　angering industries."These products have been grown in the U. S. ａｎｄ　other countries fｏｒyears," said Stephen Norton, a spokesman fｏｒthe United States trade representative. "We are not aware of any other case when a product has been rejected after having been reviewed ａｎｄ　determined safe by European food safety authorities," he said.Barbara Helfferich, a spokeswoman fｏｒMr. Dimas, declined to comment on the specifics of the procedure because commissioners had not yet made a final decision. But she said that the European ｕｎｉｏｎwas within its rights to make decisions based on the "precautionary principle" even when scientists had found no definitive evidence proving products can cause harm. She said that the decisions by Mr. Dimas could go before the commission within a few weeks, but she said that no date had been set. In the decisions, Mr. Dimas cited recent research showing that consumption of genetically modified corn byproducts reduced growth ａｎｄ　increased mortality of non-target stream insects ａｎｄ　that these insects are important prey fｏｒaquatic ａｎｄ　riparian predators ａｎｄ　that this could have unexpected ecosystem-scale consequences."Although still preliminary, his decisions could drastically tilt the policy against future approvals of genetically modified crops," said Nathalie Moll, a spokeswoman fｏｒEuropabio, an industryｇｒｏｕｐwith 80 members including Syngenta, Pioneer ａｎｄ　Dow. Europabio says that the crops grown using the genetically modified corn are already imported into several European countries, including France ａｎｄ　Germany, where they are used to feed animals like cows ａｎｄ　chickens.Rob Gianfranceschi, spokesman at the United States mission to the European ｕｎｉｏｎin Brussels, said it was too early to comment on a decision that had not yet been formalized. But he made clear that the United States remained frustrated with European policies on genetically modified crops.About the decisions, which one of the following statements is TRUE?【单选题】

A.The decisions aims to put a ban the sale of the seeds of genetically modified corn due to political ａｎｄ　biological concerns.

B.The decisions are warmly embraced by all EU members but bitterly rejected by their trade partners.

C.The decisions could probably be made even if no definitive evidence proving the products harmful is found.

D.there is high possibility that the decisions would be approved by the European Commission.

正确答案:C

答案解析:细节考查题。答案参见第五段，Dimas先生的发言人指出，即使没有确凿证据，欧洲委员会可以基于“预防原则”做出决定，故正确答案为C。