海洋中的生物死亡后,含有硅、磷、碳酸钙的骨骼或贝壳堆积在海底,可以形成()和石灰岩等

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问题:

海洋中的生物死亡后,含有硅、磷、碳酸钙的骨骼或贝壳堆积在海底,可以形成()和石灰岩等。

A.变质岩、岩浆岩

B.磷质岩、硅质岩

C.沉积岩、变质岩

D.碳酸盐岩、岩浆岩

考点:采油地质工考试初级采油地质工考试初级采油地质工考试题库
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2既是最小的质数,又是最小的偶数.______.

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设计模板以及其支架时,应考虑的主要因素有()。

A.工程结构形式

B.材料供应

C.荷载大小

D.建筑安全等级

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下列不属于企业收款条件的是()。

A.预收账款

B.现金交易

C.赊销

D.赊购

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All over the world, and for many different reasons, there are millions of people who rarely or never eat meat. These people are called vegetarians. To people who eat meat, being a vegetarian may seem like a very strange thing, diets for several different reasons.

First, vegetarians have an enormous health advantage. One of the major health problems in modern societies is not too much protein but too much fat, especially in the form of animal fats. Medical evidence suggests that animal fats, including butter, contribute to the development of cholesterol in the human body. High amount of cholesterol seem to be part of the cause of heart disease. Most vegetarians have low level of cholesterol. High amounts of animal fats also seem to lead to certain kinds of cancer, and vegetarians are typically less vulnerable to these cancers than people who eat a lot of meat. Overall, studies comparing the health of vegetarians and meat-eaters show that the meat-eaters are twice as likely to die of heart disease as vegetarians are.

Better health is one reason that people choose to become vegetarians. Another reason is religion. Some religions forbid the eating of meat. The largest of these is the Hindu religion, which has about 600 million believers in the world. Although not all Hindus are vegetarian, many are, and there are many believers of other religions such Buddhism and even some Christian religions that also do not eat meat.

Many vegetarians do not eat meat simply because they do not like the taste of it. They have no religious or philosophical reasons; they just do not like meat. Another important reason that vegetarians give for not eating meat is the health advantages that were given above. Lastly, there are many people who do not eat meat because they just do not like the idea of killing animals for food. They believe that life, all life, is valuable , and that we do not have to destroy life to feed ourselves when there are other good sources of food.

小题1:According to the passage, people choose to be vegetarians for the following reasons EXCEPT________.

A.they want to stay healthy

B.they are too kind to put the idea of killing animals

C.they live in areas where meat supply is not adequate

D.they should not eat meat due to their religious belief小题2:Which of the following is true according to Paragraph 2 ?

A.Vegetarians enjoy a more healthy life than the meat eaters.

B.Heart disease and cancer are caused by large amounts of protein.

C.There are twice as many meat-eaters as vegetarians who die of cancer.

D.There are less health problems in modern society due to advanced medical care.小题3:What does “vulnerable” mean in Paragraph 2?

A.Having low level of cholesterol.

B.Having high level of cholesterol.

C.Having weak ability to resist diseases and harms.

D.Having strong ability to resist disease and harms.小题4:It can be inferred from the passage that __________.

A.being a vegetarian may be a very strange thing

B.vegetarians eat meat on some special occasions

C.all vegetarians have reasons for their not eating meat

D.most vegetarians believe that life without meat is happy.

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下列对葡萄球菌的病原学特点描述不正确的是()

A.革兰阳性兼性厌氧菌

B.最适生长温度为37℃

C.最适生长和繁殖的pH范围为4.5~9.8

D.不耐盐,有盐不能生长

E.对热具较强的抵抗力

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