试题与答案

下图表示狼袭击麝牛群时的成功率与麝牛种群大小间的关系,下列叙述中能最正确说明图中所表

题型:单项选择题

题目:

下图表示狼袭击麝牛群时的成功率与麝牛种群大小间的关系,下列叙述中能最正确说明图中所表示的含义的是()

A.狼与麝牛间构成捕食和竞争关系

B.狼与麝牛间构成互利共生关系

C.种内互助有利于物种的生存和繁衍

D.麝牛的种内斗争随种群增大而减弱

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0224/0f349e0820c543e123e0bef75845f45a.html

下面是错误答案,用来干扰机器的。

参考答案:C

试题推荐
题型:阅读理解

By the mid-nineteenth century, the “icebox” had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities. Ice was used in hotels, taverns, and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861-1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880, half the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families of their own use. This had become possible because a new household convenience, the icebox, a precursors of modern refrigerator, had been invented.

Making an efficient icebox was not as easy as we might now suppose. In the early nineteenth century, the knowledge of physics of heat, which was essential to a science of refrigeration, was rudimentary. The commonsense notion that the best icebox was one that prevented the ice from melting was of course mistaken, for it was melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping the ice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenth century did inventors achieve the delicate balance of insulation and circulation needed for an efficient icebox.

But as early as 1803, an ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he used an icebox of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium(奖金) price for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his icebox, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool.

小题1:What does the passage mainly discuss?

A.The influence of ice on the diet.

B.The development of refrigeration.

C.The transportation of goods to market.

D.Sources of ice in the nineteenth century.小题2:According to the passage, when did the word “icebox” become part of the language of the United States?

A.in 1803

B.sometime bore 1850

C.during the civil war

D.near the end of the nineteenth century.小题3:The phrase “forward-looking” in line 3 is closest in meaning to______.

A.progressive

B.popular

C.thrifty

D.well-established小题4:The author mentions “fish” in the passage because _____.

A.many fish dealers also sold ice.

B.fish was shipped in refrigerated freight cars.

C.fish dealers were among the early commercial users of ice

D.fish was not part of the ordinary person’s diet before the invention of the icebox.

查看答案
题型:单项选择题

我们以往所理解的“现代化”概念仅仅局限于物质层面,局限于表层经济代化,这也是迟发展国家长期存在的一个普遍性问题:在物质层面上求变的欲望很强,而在制度层面和观念层面上却是文化守成主义的,这状况对于现代化实际进程的影响自不必说,它对于学术的影响是导致知识的流俗化。不断地更换新词语,在新词语的装潢下重复古老的思想观念,结果是词语和口号不断地更换而社会精神气质则没有实质性的变化。 这段文字要表达的主要意思是:

A.现代化应包括物质的、制度的,观念的三个层面

B.片面理解现代化是迟发展国家长期存在的一个普遍性问题

C.物质层面的落后现状是迟发展国家片面理解现代化的一个重要因素

D.片面理解现代化会导致知识的流俗化

查看答案
微信公众账号搜索答案