2019年職稱英語(yǔ)考試《理工類》考試共65題，分為單選題和多選題和判斷題和計(jì)算題和簡(jiǎn)答題和不定項(xiàng)。小編為您整理精選模擬習(xí)題10道，附答案解析，供您考前自測(cè)提升！

1、Breastfeeding Can Cut Cardiovascular Risk
Breastfeeding can reduce the risk of a heart attack or stroke later in life and could prevent hundreds of ______ of deaths each year, researchers said on Friday.
Babies who are breastfed have fewer childhood infections and allergies and are less prone to obesity. British scientists have now shown that breastfeeding and slow growth in the first weeks and months of life has a protective effect against cardiovascular disease.
"Diets that promote more rapid growth put babies at risk many years later in terms of raising their blood pressure, raising their cholesterol and increasing their tendency to diabetes and obesity-the four main risk factors for stroke and heart attack." said Professor Alan Lucas of the Institute of Child Health in London.
"Our evidence suggests that the reason why breast-fed babies do better is because they grow more slowly in the early weeks."
Lucas said the effects of breastfeeding on blood pressure and cholesterol later in life are greater than anything adults can do to control the risk factors for cardiovascular disease, other than taking drugs.
An estimated 17 million people die of cardiovascular disease, particularly heart attack and strokes, each year, according to the World Health Organization.
Lucas and his colleagues compared the health of 216 teenagers who as babies had either been breastfed or given different nutritional baby formulas' They reported their findings in The Lancet medical journal.
The teenagers who had been breastfed had a 14 percent lower ratio of bad to good cholesterol and lower concentrations of a protein that is a marker for cardiovascular disease risk.
The researchers also found that regardless of the child's weight at birth, the faster the infants grew in the early weeks and months of life, the greater was their later risk of heart disease and stroke. The effect was the same for both boys and girls.
"The more human milk you have in the newborn period, the lower your cholesterol level is, the lower your blood pressure is 16 years later, "Lucas said.
【單選題】

A.hundreds

B.thousands

C.millions

D.numbers

正確答案:B

答案解析:hundreds ofthousands of是固定搭配，表示“成千上萬(wàn)”之意。

2、In their productions, choreographers of modern dance have introduced humor, protested social injustice, and probed psychological problems. 【單選題】

A.solved

B.explored

C.involved

D.disputed

正確答案:B

答案解析:probe:探察、研究，與explore（探究；考察）意思相近；solve:解決；involve：使卷入、牽涉；dispute:爭(zhēng)執(zhí)、辯論。

3、Singing Alarms Could Save the Blind
If you cannot see, you may not be able to find your way out of a burning building and that could be fatal. A company in Leeds could change all that with directional sound alarms capable of guiding you to the exit.
Sound Alert, a company run by the University of Leeds, is installing the alarms in a residential home for blind people in Sommerset and a resource centre for the blind in Columbia. The alarms produce a wide range of frequencies that enable the brain to determine where the sound is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be heard by humans. "It's a burst of white noise ______ people say sounds like static on the radio," she says. "Its life-saving potential is great."
She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large smoke-filled room. It took them nearly four minutes to find the door without a sound alarm, but only 15 seconds with one.
Withington studies how the brain processes sounds at the university. She says that the source of a wide band of frequencies can be pinpointed more easily than the source of a narrow band. Alarms basedon the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to indicate whether people should go up or down stairs. They were developed with the aid of a large grant from British Nuclear Fuels.
【單選題】

A.where

B.what

C.that

D.how

正確答案:C

答案解析:選項(xiàng)A、B、D都不能構(gòu)成語(yǔ)意上的連貫，而只有C構(gòu)成一個(gè)句型——強(qiáng)調(diào)句，it's… that…這句話強(qiáng)調(diào)的是主語(yǔ)。去掉it's…that，剩下的完整句子就是“A burst of white noise， people say（插入語(yǔ)）,sounds like static on the radio”。

4、The minimum age of Chinese citizens who are eligible to vote is eighteen. 【單選題】

A.encouraged

B.enforced

C.entitled

D.expected

正確答案:C

答案解析:encouraged:被鼓勵(lì)的、受到鼓舞的；enforced:受強(qiáng)迫的、被迫的；entitled:授權(quán)的、有資格的，和句子中的eligible意思相同；expected：受到期待的、被期望的、所預(yù)期的。

5、The orangutan
Among 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 (長(zhǎng)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.
The last paragraph tells us that____.
【單選題】

A.chimpanzees can do better than human children

B.chimpanzees can do many things that human children cannot do

C.human children can do many things that chimpanzees cannot do

D.the intelligence of chimpanzees is similar to that of human children

正確答案:D

答案解析:文章最后一段指出，黑猩猩是所有猿中最聰明的，可以做人類兒童能做的事情，由此推斷，黑猩猩的智力與人類兒童的智力相似，故選D。

6、The book took ten years of thorough research.【單選題】

A.basic

B.careful

C.social

D.major

正確答案:B

答案解析:這本書花了十年時(shí)間的精心研究。本題難度不大，干擾項(xiàng)干擾不大，是送分題，thorough的引申意義指“認(rèn)真的，精心的”，careful是“認(rèn)真的”意思，所以最佳答案是B。

7、Radiocarbon Dating
Nowadays scientists can answer many questions about the past through a technique called radiocarbon (放射性碳), or carbon - 14 dating. One key to understanding how and why something happened is to discover when it happened.
Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at the University of Chicago. An atom of ordinary carbon, called carbon -12, has six protons (質(zhì)子) and six neutrons (中子) in its nucleus (原子核). Carbon - 14, or C - 14, is a radioactive, unstable form of carbon that has two extra neutrons. It returns to a more stable form of carbon through a process called decay (衰減). This process involves the loss of the extra neutrons and energy from the nucleus.
In Libby's radiocarbon dating technique, the weak radioactive emissions(放射)from this decay process are counted by instruments such as a radiation detector and counter. The decay rate is used to determine the proportion of C -14 atoms in the sample being dated.
Carbon - 14 is produced in the Earth's atmosphere when nitrogen(氮) - 14, or N - 14, interacts with cosmic rays (宇宙射線). Scientists believe since the Earth was formed, the amount of nitrogen in the atmosphere has remained constant. Consequently, C -14 formation is thought to occur at a constant rate. Now the ratio of C -14 to other carbon atoms in the atmosphere is known. Most scientists agree that this ratio is useful for dating items back to at least 50,000 years.
All life on Earth is made of organic molecules (分子) that contain carbon atoms coming from the atmosphere. So all living things have about the same ratio of C -14 atoms to other carbon atoms in their tissues (組織). Once an organism (有機(jī)體) dies it stops taking in carbon in any form, and the C -14 already present begins to decay. Over time the amount of C - 14 in the material decreases and the ratio of C - 14 to other carbon atoms goes down. In terms of radiocarbon dating, the fewer C -14 atoms in a sample, the older that sample is.
An atom of ordinary carbon has. six protons and eight neutrons.【單選題】

A.Right

B.Wrong

C.Not mentioned

正確答案:B

答案解析:本題難度不大，答案依據(jù)比較明顯，主要答案依據(jù)在文章第二段第二句：An atom of ordinary carbon，called carbon - 12，has six protons and six neutrons談到普通碳原子有6個(gè)質(zhì)子和6個(gè)中子，顯然，題干和答案依據(jù)不符，答案是B。

8、One Good Reason to Let Smallpox Live
It's now a fair bet that we will never see the total extinction (滅絕) of the smallpox (天花) virus. When smallpox was completely got rid of in the world, scientists wanted to destroy the killer virus in the last two labs, one in the US and one in Russia. They asked: If smallpox has truly gone from the planet, what point was there in keeping these reserves?
In reality, of course, it was naive to imagine that everyone would let go of such a powerful potential weapon. Undoubtedly several nations still have a few vials (小藥瓶). And the last "official" stocks of live Virus bred mistrust of the US and Russia, for no obvious gain.
Now American researchers have _____ an animal model of the human disease, opening the way for tests on new treatments and vaccines(疫苗). So once again there's a good reason to the virus, just in keep the disease puts in a reappearance.
How do we case with the mistrust of the US and Russia? deal. Keep the virus Simple international support in a well - guarded UN laboratory that's open to all countries. The US will object, of course, just as it with a multilateral (多邊的) approach to just about everything. But it doesn't mean the idea is rejects. If the virus is useful, then let's wrong it the servant of all humanity make not just a part of it.
【單選題】

A.missed

B.held

C.found

D.checked

正確答案:C

答案解析:本題有一定難度，依據(jù)上下文邏輯，文章此處要用“發(fā)現(xiàn)”的意思，答案是C。

9、One Good Reason to Let Smallpox Live
It's now a fair bet that we will never see the total extinction (滅絕) of the smallpox (天花) virus. When smallpox was completely got rid of in the world, scientists wanted to destroy the killer virus in the last two labs, one in the US and one in Russia. They asked: If smallpox has truly gone from the planet, what point was there in keeping these reserves?
In reality, of course, it was naive to imagine that everyone would let go of such a powerful potential weapon. Undoubtedly several nations still have a few vials (小藥瓶). And the last "official" stocks of live Virus bred mistrust of the US and Russia, for no obvious gain.
Now American researchers have found an animal model of the human disease, opening the way for tests on new treatments and vaccines(疫苗). So once again there's a good reason to the virus, just in _____ the disease puts in a reappearance.
How do we case with the mistrust of the US and Russia? deal. Keep the virus Simple international support in a well - guarded UN laboratory that's open to all countries. The US will object, of course, just as it with a multilateral (多邊的) approach to just about everything. But it doesn't mean the idea is rejects. If the virus is useful, then let's wrong it the servant of all humanity make not just a part of it.
【單選題】

A.put

B.keep

C.remove

D.study

正確答案:B

答案解析:本題難度不大，依據(jù)上下文邏輯，文章此處要用“保存”的意思，答案是B。

10、Seeing Red Means Danger Ahead
The color red often means danger and by paying attention, accidents can be prevented. In the future, the color red also may help prevent danger at construction sites. Thanks to new work by engineers, bridge supports or other kinds of materials, could one day contain a color - changing material. It will turn red before a structure collapses or falls apart.
The secret behind the color - changing material is a particular type of molecule (分子). A molecule is a group of atoms (原子) held together by chemical bonds. Molecules come in all shapes and sizes and make up everything you can see, touch or feel. How a molecule behaves depends on what kinds of atoms it contains and how they're held together.
When a polymer (聚合物) containing a color - changing molecule called a mechanophore (機(jī)械響應(yīng)性聚合物) is about to break, it produces a color. When a polymer with mechanophore molecules becomes "injured" or weak, one of the mechanophore bonds breaks and the material turns red. "It's a really simple detection method," says Nancy Sottos, one of the scientists who worked on the project. Sottos and her team tested the color - changing polymers in their lab. The test _____ proved encouraging.
There is a way to get rid of the red color light. When a bright light is shone on the mechanophore, the broken bond is fixed and the red color disappears. Thus "self - healing" may be a problem for engineers. They need to use the color - changer in big construction projects that will be outside, under sunlight. And sunlight will make the mechanophore's warning system useless.
Sottos and her fellow scientists still have a lot of work to do before the color - changing molecules can be used outside the lab.
【單選題】

A.results

B.rules

C.tools

D.methods

正確答案:A

答案解析:本題難度不大，考查的是詞義辨析。很明顯，文章此處的意思是“結(jié)果”，答案是A。