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Through a series of experiments, an American scientist has obtained an understanding of th

e social structure of the most complex of ant societies. The ants examined are the only creatures other than man to have given up hunting and collecting for a completely agricultural way of life. In their underground nests they cultivate gardens on soil made from finely chopped leaves. This is a complex operation requiring considerable division of labor. The workers of this type of ant can be divided into four groups according to size. Each of the groups performs a particular set of jobs.

The making and care of the gardens and the nursing of the young ants are done by the smallest workers. Slightly larger workers are responsible for chopping up leaves to make them suitable for use in the gardens and for cleaning the nest. A third group of still larger ants do the construction work and collect fresh leaves from outside the nest. The largest are the soldier ants, responsible for defending the nest.

To find out how good the various size-groups are at different tasks, the scientist measured the amount of work done by the ants against the amount of energy they used. He examined first the gathering and carrying of leaves. He selected one of the size-groups, and then measured how efficiently these ants could find leaves and run back to the nest. Then he repeated the experiment for each of the other size-groups. In this way he could see whether any group could do the job more efficiently than the group normally undertaking it.

The intermediate-sized ants that normally perform. this task proved to be the most efficient for their energy costs, but when the scientist examined the whole set of jobs performed by each group of ants it appeared that some sizes of worker ant were not ideally suited to the particular jobs they performed.

In which way are the ants different from other non-human societies？

A．They do not need to search for food.

B．They do not need to look for shelter.

C．Individuals vary in social status.

D．Individuals perform. different functions.

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更多“Through a series of experiment…”相关的问题

第1题

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第2题

英译汉： In creating a lens a lens designer attempts to “trap” light by forcing all the rays arising

from a single point in the subject to focus on a single point in the image, as a consequence of their passing through a series of transparent (透明的) elements with precisely curved surfaces.

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第3题

从下面提供的答案中选出应填入下列英文语句中______内的正确答案。 The relational database model require

从下面提供的答案中选出应填入下列英文语句中______内的正确答案。

The relational database model requires the data be(1)through programs that don't rely on the position of the data in the database. This is in direct(2)to the other database mode, where the program has to follow a series of pointers to the data it seeks.A program(3)a relational database simply asks for the data it seeks; the DBMS performs the necessary searches and(4)the information. The(5)on how the search is done are specific to the DBMS and vary from product to product.

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第4题

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第5题

根据以下内容回答下列各题, In ancient times wealth was measured and exchanged in things tha

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第6题

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第7题

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第8题

The Asian Edge？ Its Confucius Confucius developed a philosophy that powerfully shaped

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第9题

Lens design and chess playing are similar in that ____

Designing a lens can be compared to playing chess. In chess a player tries to trap his opponent's king in a series of moves. In creating a lens a lens designer attempts to “trap” light by forcing all the rays arising from a single point in the subject to focus on a single point in the image, as a consequence of their passing through a series of transparent(透明的) elements with precisely curved surfaces. Since in both cases the ultimate goal and the means by which it can be attained are known, one is tempted to think there will be a single best decision at any point along the way. The number of possible consequences flowing from any one decision is so large, however, as to bevirtually, if not actually, infinite. Therefore in lens design, as inchess, perfect solutions to a problem are beyond reach. Although this article will be concerned only with the design of photographic lenses, the same principles apply to all lenses.

The lens designer has one enormous advantage over the chess player: the designer is free to call on any available source of help to guide him through the staggering number of possibilities. Most of that help once came from mathematics and physics, but recently computer technology, information theory,chemistry, industrial engineering and psychophysics have all contributed to making the lens designer's job immeasurably more productive. Some of the lenses on the market today were inconceivable a decade ago. Others whose design is as much as a century old can now be massproduced at low cost. With the development of automatic production methods, lenses are made by the millions, both out of glass and out of plastics. Today's lenses are better than the best lenses used by the great photographers of the past.Moreover, their price may lower, in spite of the fact that 19thcentury craftsmen worked for only a few dollars a week and today's lenses are more complex. The lens designer cannot fail to be grateful for the science and technology that have made his work easier and his creations more widely available, but he is also humbled: it is no longer practical for a fine photographic lens to be designed from beginning to end by a single human mind.

Lens design and chess playing are similar in that ____

A) the final goal and the means by which it can be reached are known

B) perfect solutions to a problem can be found

C) any one decision at any point along the way to the goal can bring numerous possible results

D) both A and C

根据阅读材料回答问题。本题为单选题，请给出正确答案及解析，谢谢！

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第10题

More than 2,000 years ago, the philosopher Socrates wandered around Athens asking questio

ns, an approach to find【M1】______ truth that thinkers venerated ever since. In modern times, the【M2】______ Socratic method was adapted for use in universities and became the dominant form. of instruction for students learning philosophy and the law. The most recently national survey on the subject【M3】______ found that 97% of law-school professors use the Socratic method in first-year classes. Socratic dialogues seem to work for the【M4】______ ancient Greeks. Are they efficient for people today？ Recently, a【M5】______ group of researchers decided to find out. In a study published in the December 2011 issue of the journal Mind, Brain, and Education, four cognitive scientists from Argentina describe what happened when they asked contemporary high school and college students a series of questions identified to【M6】______ those posed by Socrates. In one of his most famous lessons, Socrates showed a young slave boy with a square, then led him【M7】______ through a series of 50 questions intended to teach the boy how to draw the second square with an area twice as large as the first. Students in the 2011 experiment, led by researcher Andrea Goldin, gave answers astonishing similar to those offered by Socrates【M8】______ pupils, even making the same mistakes he made. " Our results【M9】______ show that the Socratic dialogue is built on a strong intuition of human knowledge and reasoning which persist more than【M10】______ twenty-four centuries after its conception," the researchers write. Their findings, Goldin and his co-authors add, demonstrate the existence of "human cognitive universals traversing time and cultures."

【M1】

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第11题

Designing a lens can be compared to playing chess. In chess a player tries to trap his opp

onent's king in a series of moves. In creating a lens a lens designer attempts to "trap" light by forcing all the rays arising from a single point in the subject to focus on a single point in the image, as a consequence of their passing through a series of transparent(透明的) elements with precisely curved surfaces. Since in both cases the ultimate goal and the means by which it call be attained are known, one is tempted to think there will be a single best decision at any point along the way. The number of possible consequences flowing from any one decision is so large, however, as to be virtually, if not actually, infinite. Therefore in lens design, as in chess, perfect solutions to a problem arc beyond reach. Although this article will be concerned only with the design of photographic lenses, the same principles apply to all lenses.

The lens designer has one enormous advantage over the chess player: the designer is free to call on any available source of help to guide him through the staggering number of possibilities. Most of that help once came from mathematics and physics, but recently computer technology, information theory, chemistry, industrial engineering and psychophysics have all contributed to making the lens designer's job immeasurably more productive. Some of the lenses on the market today were inconceivable a decade ago. Others whose design is as much as a century out can now be mass-produced at low cost. With the development of automatic production methods, lenses are made by the millions, both out of glass and out of plastics. Today's lenses are better than the best lenses used by the great photographers of the past. Moreover, their price may lower, in spite of the fact that 19th-century craftsmen worked for only a few dollars a week and today's lenses are more complex. The lens designer cannot fail to be grateful for the science and technology that have made his work easier and his creations more widely available, but he is also humbled: it is no longer practical for a fine photographic lens to be designed from beginning to end by a single human mind.

Lens design and chess playing are similar in that______.

A．the final goal and the means by which it can be reached are known

B．perfect solutions to a problem can be found

C．any one decision at any point along the way to the goal can bring numerous possible results

D．both A and C

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