From the word "'docile", we can see that-考呗网题库移动版

单选题From the word "'docile", we can see that

A． some words convey completely opposite meanings
B． Latin makes up the most important root for English words
C． its rare meaning is also given in the dictionary
D． some English words derive from Latin

参考答案D

解析: 定位：根据题干中的信息词docile定位到最后一段第四句，即括号内内容的第一句。
解析：由该句可知 “docile”这个词来源于拉丁语“docilis”，由此可推断，一些英文单词来源于拉丁文。故D项符合文意，为正确答案。B项虽然也提到拉丁文，但原文并未提及拉丁文是英语词汇的词根中最重要的构成部分，故可排除。A项和C项均不合文意。

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单选题Questions are based on the following passage.
There can be few more depressing stories in the entire history of man's exploitation of nature than the destruction of the unfortunate great whales. The whales have not only suffered untold cruelty but now face total extermination (灭绝.. Already entire populations have been wiped out, and the only reason why no species has yet been finished off is due to the vastness and inaccessibility (难达到. of the oceans; a pocket or two somewhere has always managed to escape. How ironic if biological extinction were to complete the job.
The basic rule of extinction is very simple: it occurs when a species mortality is continually greater than its recruitment. There are though, some very special additional factors in the case of whales.
Man does not actually have to kill the last whales of a species with his own hands, as it were, to cause its disappearance. Biological extinction will quickly follow the end of commercial whaling, should that end be due to a shortage of raw material, i.e. of whales. Whalers have long sought to defend their wretched trade by insisting that whales are automatically protected: as soon as they become rare, and therefore uneconomic to pursue, man will have no choice but to stop the hunting. That is a very nice theory, but it is the theory of an accountant and not of a biologist; only an accountant could apply commercial economics to complex biological systems. The reasons for its absurdity are many and varied. In the case of whaling it can be summed up in the following way.
When the stock has been reduced below a critical level, a natural, possibly unstoppable downward spiral begins because of three main factors. First, the animals lucky enough to survive the slaughter will be too scattered to locate one another owning to the vastness of the oceans. Secondly, whales being sociable animals probably need the stimulus of size able gatherings to induce reproductive behavior. It is quite likely that two individuals meeting through chance will not be compatible. (They can hardly be expected to be aware of their own rarity or to realize any need for adjusting their natural inclinations. . This is especially so with polygamous (一夫多妻的. species like the Sperm Whale. Thirdly, and perhaps most important in the long term, even allowing that the whales might still be able to band together in socially acceptable groups (thanks to their undeniably excellent communicative systems., there is a real danger, possibly even a probability, that the whales' gene pools would by then have sunk so low as to be biologically unviable. That is to say, the characteristics possessed by the original population would be whittled down to those characters possessed by only the few remaining individuals. The result of such a biological disaster is inbreeding (近亲繁殖., less ability to adapt to new conditions, and less individual variety. Three words can sum it up: permanent biological extinction. The future . "hopes" of these animals are further discussed in the final chapter.
According to the passage, the extinction of whales is caused by

A． man's continuous evolution process
B． people's excessive hunting and killing
C． the changing living conditions in nature
D． the demand from a booming economy

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单选题What can we infer from the basic rule of extinction?

A． Whales die more than they are born each year.
B． Whales' reproductive ability remains a very low rate.
C． The species of whales is doomed to extinction.
D． Whales' death rate keeps an increasing trend.

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单选题In whale hunters' eyes, whales' numbers can be adjusted by

A． people's growing awareness of the balance between ecology and business
B． their theory which has been derived from life experiences
C． a flexible biological system in which all species survive
D． the change of balance between market need and the amount of whales

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