我国有2000万个家庭靠生产蚕丝维持生计，出口量占世界市场的3/4，然而近年来丝绸业面临出口困境：丝绸形象降格，出口数量减少，又遇到亚洲的一些竞争对手，有些国家还对丝绸进口实行了配额，这无疑对我国丝绸业是一个打击。以下哪项不是造成上述现象的原因？
A．丝绸行业的决策者不认真研究国际行情，缺乏长远打算，只追求短期效益。
B．近年来国内厂家一门心思提高丝绸产量，而忘记了质量。
C．中国的丝绸技术传到了外国，使丝绸市场有了竞争对手。
D．丝绸是人们非常喜欢的一种夏季面料，穿着凉爽、舒适。

Host: What about a drink？ Guest:______.
A．Please don't be so polite.
B．I wouldn't mind a cup of coffee.
C．Could you spare me a cup of coffee？
D．I like coffee.

“强子也有结构”，强子结构是由：
A．夸克构成
B．夸克和胶子构成
C．中子、质子构成
D．介子构成

Today cognitive theorists empirically study the impact of feelings on cognitive processes such as memory and judgment and also the reciprocal influence of cognition on emotion. However, evolutionary theorists view emotion as a powerful source of motivation—an internal communication that something must be done. For example, when people are threatened, they fed fear, which in turn leads them to deal with the threatening situation through either fight or flight. Emotions and drives may also operate in tandem to motivate action, as when excitement accompanies sexual arousal. From an evolutionary perspective, different emotions serve different functions. Fear facilitates flight in the face of danger; disgust prevents ingestion me potentially toxic substances such as rotting meat.
An emotion that is less well understood is jealousy. Why do people become jealous in intimate sexual relationships？ One series of studies tested evolutionary hypotheses about differences in the concerns men and women have about their partners' fidelity. Since females can have only a limited number of children during their lifetimes, to maximize their reproductive success they should be motivated to form. relationships with males who have resources and will contribute them to their offspring. Indeed, cross-cultural evidence demonstrates that one of the main mate selection criteria used by females around the world is male resources. From a female's point of view, then, infidelity accompanied by, emotional commitment to the other woman is a major threat to resources. A man unlikely to divert resources from his mate and her offspring to a casualling, but the risk increases dramatically if he becomes emotionally involved and perhaps considers switching long-term partners. Hence, a woman's jealousy would be expected to focus on her mate's emotional commitment to another female.
For males, the situation is different. If a male commits himself to an exclusive relationship with a female, he must be certain that the offspring in whom he is investing are his own. Since he cannot be sure of paternity, the best he can do is to prevent his mate from copulating with any other males. In males, then, jealousy would be expected to focus less on the female's emotional commitment or resources and more on her tendency to give other males sexual access. Indeed, in species 'ranging from insects to humans, males take extreme measures to prevent other males from inseminating their mates. In humans, male sexual jealousy is the leading cause of homicides and of spouse battering cross-culturally.
This passage discusses the______approach to human emotions.
A．evolutionary
B．cognitive
C．psychological
D．economic

阅读下文，回答下列各题。
约言之，藏书的当能铸冶治学的风气，影响学风，学术思想的活跃，学术思想的活跃又进一步学风，并给著述提供津梁。战国时期学术的百家争鸣的出现，无疑与图书事业的发展有千丝万缕的联系。。梁代萧绎出任荆州称帝江陵，，招致饱学之士如林，使长江中游地方出现了一次学风高潮，成为全国性的文化中心。明末士大夫藏书已成风气，这把许多士人学子引向了读书治学，蔚然而兴学风。明清学风在江南大盛，而江南藏书号称最富，全国性的藏书胜所大约在燕京、金陵、姑苏、临安四地，而江南奄有三处。虞山人钱谦益降云楼藏书几可与内府相埒（liè等同)。郑人范钦天一阁藏书为两浙第一。常熟人毛晋藏书达84000册之巨。《清代藏书楼发展史》一书说，明清的藏书事业如火炬一样被传递着”，“使它成为此后三百年中推动学术发展的一个重要力量”。藏书之所往往是人文荟萃之地。江南多藏书，故江南多才士，已为世所称道。藏书之所往往是人文荟萃的地方。前说南梁江陵曾为一个文化中心，有藏书十余万卷，文人学士多会于斯。公元544年西魏大军攻破江陵，十余万卷图书付之一炬，藏书毁灭殆尽，这个学术中心便不复存在，使斯地出现过好几百年的人文萧条。
这段文字中首句的空缺处应以下列哪一项填入：
A．学风的兴盛与藏书紧密相连
B．学风的盛大与藏书多少相关
C．藏书众多则学风兴盛
D．学风的兴衰与藏书紧密相关

The key problem in dealing with returned plastic beverage containers is______.
A．to sell them at a profitable price
B．how to turn them into useful things
C．how to reduce their recycling costs
D．to lower the prices for used materials