2021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、Waving With LightIn the Sierra Madre mountain range of west central Mexico, the native Huichol people live much the way their ancestors did without electricity. That\'s because it\'s too expensive to string power lines to the remote mountain areas where they live. To help support themselves, the Huichol create beautiful artwork. They sell their art in cities hundreds of miles away from their villages. And without electricity at home or on the road, they can only work during daylight hours. When it gets dark, they must stop whatever they\'re doing. Now, a team of scientists, designers, and architects are using new technologies to provide the Huichol with light after the sun sets. The scientists\' technique involves weaving tiny electronic crystals into fabrics that can be made into clothes, bags, or other items. By collecting the sun\'s energy during the day, these lightweight fabrics provide bright white light at night. Their inventors have named the fabrics "Portable Lights." Portable Lights have the potential to transform the lives of people without electricity around the world, says project leader Sheila Kennedy. "Our invention," Kennedy says, "came from seeing how we could transform technology we saw every day in the United States and move it into new markets for people who didn\'t have a lot of money."At the core of Portable Light technology are devices called high-brightness light-emitting diodes, or HB LEDs. These tiny lights appear in digital clocks, televisions, and streetlights. LEDs are completely different from the light bulbs. Most of those glass bulbs belong to a type called incandescent lights. Inside, electricity heats a metal coil to about 2,200 degrees Celsius. At that temperature, bulbs give of flight we can see. Ninety percent of energy produced by incandescent lights, however, is heat and invisible. With all that wasted energy, bulbs burn out quickly. They are also easily broken. LEDs, on the other hand, are like tiny pieces of rock made up of molecules that are arranged in a crystal structure. When an electric current passes through an LED, the crystal structure produces light. Unlike incandescent bulbs, they can produce light of various colors. Within an LED, the type of molecules and their particular arrangement determines what color is produced. What does Sheila Kennedy say about Portable Lights?【单选题】

A.This invention can change the lives of people, both rich and poor.

B.They are widely used in the United States.

C.Portable Lights can help poor people around the world to get light.

D.They are expensive to make but easy to carry.

正确答案:C

答案解析:短文的第4段和第5段提供了答案。短文第4段的句子说了Portable Lights可以在世界范围内改变穷乡僻壤用不上电的人们的生活，选项C准确地表达了这层意思，所以是答案。A不是答案，说Portable Lights能改变富人和穷人的生活，不符合原文的意思。短文没有提及Portable Lights在美国使用，也没有说Portable Lights是否花费很大。所以B和D都不是答案。

2、Don\'t just stand by. Can\'t you lend a hand?【单选题】

A.loan

B.offer

C.help

D.understand

正确答案:C

答案解析:lend a hand等于offer a hand，是固定搭配，“帮忙”的意思；loan：贷款；help：帮助；understand:理解。

3、Enormous sums of money have been spent on space exploration.【单选题】

A.Much

B.Large

C.Small

D.Fixed

正确答案:B

答案解析:题干大意：很大一部分钱用在太空探索上。画线词enormous：巨大的。选项中，large：巨大的。much：很多的。如：It takes too much time. 这件事花太多时间了。small：小的。如：This small present is for you. 这个小礼物是送给你的。fixed：固定的。如：Yin and Yang are not fixed or still, but active and changeable. 阴和阳并不是固定的、静止的，而是活跃的、可改变的。

4、While we don\'t agree, we continue to be friends.【单选题】

A.Whoever

B.Where

C.Although

D.Whatever

正确答案:C

答案解析:题干大意：虽然我们意见不同，但是我们仍然是朋友。画线词while引起的是一个让步从句，所起的作用是跟although一样的。whoever：无论任何人。where：哪里。如：Where are you from? 你从哪里来？whatever：无论什么。

5、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, or black 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 for more than a night or two. Then they move on to look for more 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. What does the first paragraph tell us?【单选题】

A.The ape looks like human beings most.

B.People and the ape think alike.

C.People and the ape behave alike.

D.The ape is the most intellectual animal in the world.

正确答案:A

答案解析:由文章首句可知，在自然界中，猿与人最相似，故选A。