题目内容
（请给出正确答案）
A．extinction
B．migration
C．destruction
D．extraction
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（由简答题聘请的专业题库老师提供的解答）
更多“Many rare species of plants and animals are threatened with______ with the worsening of en”相关的问题
A．migration
B．extinction
C．distinction
D．distraction
A．migration
B．extinction
C．distinction
D．distraction
A) a third of all plants B) many major animal groups living in cold spots
C) rich biological diversity D) many rare species living in cold spots
A．When in captivity, pandas typically produce more young than they do in their native habitat.
B．Newborn pandas in zoos are not likely to die from infectious diseases, whereas newborn pandas in the wild are likely to die from these diseases.
C．Sufficient quantities of bamboo, the panda"s only food, cannot be made available outside the panda"s native habitat.
D．Many zoos are eager to increase their stock of rare and exotic animals, but there are not enough pandas for all the zoos that want one.
E．Pandas in zoos have as many offspring that survive to adulthood as do pandas in the wild.
听力原文： The Giant Panda is also known as the "Panda Bear", "Bamboo Bear", or in Chinese as "Daxiongmao", which means "large bear cat". The scientific name means "black and white cat-footed animal".
As for the history of the Giant Panda, it is said that the earliest appearance of the Panda was somewhere between the late Pliocene or early Pleistocene periods—two to three million years ago.
Panda fossils have been discovered in the areas of Burma and Vietnam and in particular, East China, as far north as Beijing.
In the second century AD the Giant Panda was a rare and semi-divine animal inside China. In the Han Dynasty, the emperor's garden, in what was then known as the capital—Xi'an, held nearly 40 rare animal species, of which the panda was the most highly treasured.
Scientists have debated for more than a century whether Giant Pandas actually do belong to the bear family or whether they are more related to the raccoon family or perhaps a separate family of their own. This is because the Giant Panda and its cousin, "the Lesser" or "Red Panda", share many characteristics with both bears and raccoons.
Recent DNA analysis indicates that Giant Pandas are most definitely of the bear species although different enough to be put into its own sub family. The red pandas are more closely related to raccoons. Giant Pandas are categorized in the bear family while Red Pandas are categorized in the raccoon family.
(33)
A．One to three million years ago.
B．Two to three million years ago.
C．One to three billion years ago.
D．Two to three billion years ago.
Exporters obtained the specimens in the food markets rather than going out to collect them in the wild. Treatment of the turtles prior to reaching the markets resulted in many of them being diseased. Packed tightly into crates, often for journeys of several weeks without food, it is little wonder that many specimens exported to western countries fared poorly when purchased as pets.
Throughout the Far East turtles and tortoises have featured in various cultures and certain religions. They have also been used for hundreds of years for food and medicine. Traditional Chinese medicine is probably the greatest threat to the three-striped box and to the thousands of other turtles that are imported yearly into China. Turtles are well known for their longevity, which it is thought will be passed on to those eating them. Turtle blood, bones and shells -- particularly the plastron (ventral part of the shell) -- are thought to have medicinal properties and be able to cure a number of ailments. Turtle eggs are also used for food and medicine. The medicinal value of the turtles is open to question, and it is possible that herbs could produce the same effects. Any beneficial substances from the turtles could also be synthesized chemically, so as to prevent the killing of turtles.
The southern part of China has become more prosperous in recent years, and the demand for turtles has increased dramatically. Turtle dishes are served in restaurants and regarded as an expensive delicacy, even a status symbol.
As turtle supplies in China dwindled, traders started importing the animals from Vietnam. As a result, many Vietnamese turtles have now disappeared from their haunts in the wild. To satisfy growing demand, importers have now turned to sources farther afield, including Cambodia, Laos, Nepal, India, Bhutan and Indonesia.
Since biologists started studying turtles in Chinese food markets, several previously unknown and extremely rare species have been found; some are on Appendix I of CITES. At the present rate of collection such specimens, and even species not yet discovered, could soon be extinct. The three-striped box turtle is simply one among dozens of other species flooding into China, but its high value makes it a special target for collectors.
According to this passage, turtles are of great importance in China because they are ______.
A．rare
B．the most expensive in food markets
C．imported into China
D．used to cure certain diseases
Rare species of____ and insects
China has established three (nature reserves) to protect (the rare species), covering (a total of) more than 600,000 sq km, an area (40 times of the size) of Beijing.
A．nature reserves
B．the rare species
C．a total of
D．40 times of the size
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