问题 选择题

蚯蚓与人类的关系密切,它不但可以疏松土壤,还可以(   )

A.食用

B.处理垃圾

C.增加土壤肥性

D.前三项都可以

答案

答案:D

蚯蚓对人类的益处 蚯蚓对人类的益处很多.蚯蚓在土壤里活动,使土壤疏松,空气和 水分可以更多地深入土中,有利于植物生长,能够起到改良土壤的作用.蚯蚓俗称曲蟮,中药称地龙,地龙性寒味咸.功能:清热、平肝、止喘、通洛.主治高热狂燥,惊风抽搐,风热头痛,目赤、半身不遂等.地龙提供取液有良好的定咳平喘的作用.蚯蚓灰与玫瑰油混合能织秃发;蚯蚓含蚓激酶,蚯蚓酶还有降低血液粘度,抑制血小板凝集、抗凝血,促进血流通畅等作用,对中风后遗症、动脉硬化、高血压和高血粘度症等有治疗作用.利用蚯蚓来处理有机废物的效率很高,如1亿条蚯蚓一天就可吞食40吨有机废物.蚯蚓能够提高土壤的肥力,蚯蚓吃进的腐烂有机物和大量土粒,经过消化形成粪便排出体外,其中含有丰富的氮,磷,钾等养分.蚯蚓的身体含有大量的蛋白质和脂肪,营养价值很高,是优良的蛋白质饲料和食品.

故选:D

解答题
阅读理解

  A vegetarian(素食者)diet may help to protect people against cancer, a UK study suggests. Analysis of data from 52,700 man and women shows that those who did not eat meat had significantly fewer cancers than those who did.

Published in American Journal of Clinical Nutrition, the findings were worth looking into .Although it is widely recommended that people eat some fruits and vegetables every day to reduce their risk of cancer and other diseases, there is very little evidence showing that a vegetarian diet can surely reduce cancers .

But surprisingly, the researchers also found a higher rate of colorectal(直肠的)cancer – a disease connected with eating red meat – among the vegetarians.

Study leader Professor Tim Key, a researcher at the University of Oxford, said no previous study had looked at the diet in this way and that there had been a lot of confusion about the issue.

“It’s interesting – it suggests there might be some reduction in cancers in vegetarians, but we need to look carefully at that”, said the professor.

More work is needed to show the connections between diet and cancer but such studies are very hard to do. Dr Joanne Lunn, a senior nutrition scientist at the British Nutrition Foundation, said the findings highlighted the fact that cancer is a complex disease and many different lifestyle factors play a part in determining a person’s risk.

73. What would be the best title for the passage?

A. Reasons for getting cancers.

B. Vegetarians get fewer cancers.

C. Tips on avoiding cancers.

D. A surprising discovery on colorectal cancer.

74. Why are the findings worth looking into?

A. They can encourage healthy eating.

B. They show that cancer is a complex disease.

C. they show a brand new discovery.

D. They have been published in American Journal of Clinical Nutrition.

75. We can learn from the passage that _________.

A. people eating red meat are unlikely to get colorectal cancer

B. the diet is one of the many factors that determine a person’s health

C. the connections between a vegetarian diet and cancer are clear through the research

D. scientists will soon figure out the relationship between the diet and cancer