史密斯:根据《国际珍稀动物保护条例》的规定,杂种动物不属于该条例的保护对象。《国际珍稀动物保护条例》的保护对象中,包括赤狼。而最新的基因研究技术发现,一直被认为是存种物种的赤狼实际上是山狗与灰狼的杂交品种。由于赤狼明显需要保护,所以条例应当修改,使其也保护杂种动物。 张大中:您的观点不能成立。因为,如果赤狼确实是山狗与灰狼的杂交种的话,那么,即使现有的赤狼灭绝了,仍然可以通过山狗与灰狼的杂交来重新获得。 以下哪项最为确切地概括了张大忠与史密斯争论的焦点
A. 赤狼是否为山狗与灰狼的杂交种。
B. 《国际珍稀动物保护条例》的保护对象中,是否应当包括赤狼。
C. 《国际珍稀动物保护条例》的保护对象中,是否应当包括杂种动物。
D. 山狗与灰狼是否都是纯种物种。
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Passage TwoQuestions 29 to 31 are based on the passage you have just heard.
A. The beauty of clothing.
B. The comfort of clothing.
C. The suitability of clothing.
D. The cost of clothing.
合同中规定装运条款为“9/10月份装运”,我出口公司必须将货物于9月、10月两个月内,每月各装一批。( )
A. 对
B. 错
进料加工项下进口料件,属于国家进口许可证管理商品的,免领进口许可证。( )
A. 对
B. 错
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to maintain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars. Even though scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar sys- tem are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by American scientist, Professor Carl Sagan. Sagan believes that before the earth’s resources are completely exhausted it will be possible to change the atmosphere of Venus. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there. Sagan suggests that algae(藻类) organisms(生物,有机体) that can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in condition similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Space- ship will then’ fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide(二氧化碳) into oxygen and carbon. When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on but the rain will eventually fall and in a few years something like earth will be reproduced on Venus. If the population of’ the earth goes on increasing at its present rate, when will we use up all the oil that drives our cars
A. By the end of the twenty-second century.
By the end of the twenty-first century.
C. By the middle of the twenty-first century.
D. By the middle of file twenty-second century.