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、Have you talked to her lately?【单选题】

A.lastly

B.finally

C.shortly

D.recently

正确答案:D

答案解析:题干大意：你最近跟她聊天了吗？画线词lately和选项recently都有“最近”的意思。lastly：最后，终于；finally:最后，终于；shortly:立刻，简短地。故答案为D。

2、An Early Form of Jazz MusicMusic comes in many forms; most countries have a style of their own. At the turn of the last century, when jazz was born, America had no prominent music 0f its own. No one knows exactly when was invented or by whom. But it began to be heard in the early 1890s. Jazz is America\'s contribution to popular music. In contrast to classical music, which follows formal European traditions, jazz is spontaneous and free in form. It bubbles with energy, expressing the moods, interests, and emotions of the people. In the 1920s\' jazz sounded like America. And so it does today. The ____ 0f the music are as interesting as the music itself. American Negroes, or blacks, as they are called today, were the jazz pioneers. They were brought to the Southern states as slaves. They were sold to plantation owners and forced to work long hours. When a Negro died, his friends and relatives formed a procession to carry to body to the cemetery. In New Orleans, a band often accompanied the body . On the way to the cemetery the band played slow, solemn music, suited to the occasion. Furthermore 0n the way home the mood changed. Spirits lifted. Death had removed one of their numbers, but the living were glad to be alive . The band played happy music, improvising on both the harmony and the melody of the tunes played at the funeral. This music made everyone want to dance. It was an early form ofjazz. 【单选题】

A.discoveries

B.originals

C.resources

D.origins

正确答案:D

答案解析:下面要讲的是有关爵士乐的起源，所以只能找origins，其他选项的词义都不对。

3、The courageous boy has been the subject of massive media coverage.【单选题】

A.extensive

B.continuous

C.instant

D.quick

正确答案:A

答案解析:这个勇敢的男孩成为了媒体大幅报道的对象。本题难度不大，干扰项干扰不强。massive和extensive都可指“大量的”，其他项和答案意义差异较大，最佳答案是A。

4、Geology and Heap(1)The importance of particular metals in the human diet has been realized within the past few decades, and the idea that geology might be related to health has been recognized for a number of elements such as iodine, zinc and selenium. For example, soils with low iodine contents produce crops, and animals deficient in iodine. A lack of iodine in the human diet leads to some serious diseases.(2)The ultimate source of metals within the human body is rocks, which weather into soil, gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth. The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environment have effects on the chemistry and health of plants, animals and people.(3)So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems. Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled. However, small children are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.(4)Heavy metals are persistent: they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning(5)In contrast, naturally contaminated soils have not been subject too risk assessment studies and rehabilitation measures, despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.(6)There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils. Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body. Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.Industrially contaminated sites usually require a thorough clean-up due to ____.【单选题】

A.industrially polluted soils

B.rock and soil chemistry

C.naturally polluted soils

D.the pathways of metals into the food chain

E.the element of iodine

F.the persistence of heavy metals

正确答案:F

答案解析:第4段涉及这一问题。受到工业污染的土壤含有重金属，而且重金属很稳定，不容易降解，所以要对重金属进行彻底的清除。

5、A Carrot a Day Keeps Cancer AwayAmong all the malignancies, lung cancer is the biggest killer: more than 100,000 Americans a year die of the disease. Giving up smoking is one of obvious way to reduce the risk, but another answer may lie in the kitchen. According to a new report, even heavy smokers may be protected from developing lung cancer by a simple dietary measure: a daily portion of carrots, spinach or any other vegetable or fruit containing a form of vitamin A called carotene.The finding, published in the British medical journal The Lancet, is part of a long-range investigation of diet and disease. Since 1957 a team of American researchers has monitored the dietary habits and medical histories of 2,000 middle-aged men employed by the Western Electric Co. in Chicago. Led by Dr. Richard Shelelle of Chicago\'s Rush-Presbyterian, St. Luke\'s Medical Center, the researchers recently began to sort out the links between the subjects\' dietary patterns and cancer. Other studies of animals and humans have suggested that vitamin A offers some protection against lung cancer. The correlation seemed logical, since vitamin A is essential for the growth of the epithelial (上皮的) tissue that lines the airways of the lungs.Vegetables: But the earlier research did not distinguish between two different forms of the vitamin. "Preformed" vitamin A, known as retinol, is found mainly in liver and dairy products like milk, cheese, butter and eggs. But vitamin A is also made in the body from carotene, which is abundant in a variety of vegetables and fruits, including carrots, spinach, squash, tomatoes, sweet potatoes and apples.In the Western Electric study, Shekelle and his colleagues found little correlation between the incidence of lung cancer and the consumption of foods containing preformed vitamin A, but when they examined the data on carotene intake, they discovered a significant relationship. Among the488 men who had the lowest level of carotene consumption, there were fourteen cases of lung cancer, in a group of the same size that ate the most carotene, only two cases developed. The apparent protective effect of carotene held up even for longtime smokers but to a lesser degree.Further studies will be necessary before the link between lung cancer and carotene can be firmly established. In the meantime, researchers warn against taking large numbers of vitamin A pills, because the tablets contain a form of the chemical that can be extremely toxic in high doses. Instead, they advise a well-balance diet that includes foods rich in carotene. For a smoker, a half-cup of carrots every day might possibly make the difference between life and death.Where is carotene present?【单选题】

A.tomatoes

B.carrots

C.squash

D.all of the above

正确答案:D

答案解析:根据第3段，“维生素A在体内的产生源于胡萝卜素，胡萝卜素在蔬菜、水果中大量存在，包括胡萝卜、菠菜、西葫芦、西红柿和苹果”。因此答案是D。