应收账款周转率提高，意味着企业( ) A．流动比率提高 B．短期偿债能力增强 C．

遗传学家，小麦育种专家李振声被授予中国国家最高科技奖。他用小麦与偃麦草进行远缘杂交，育成了一系列小麦良种，此培育过程运用的生物原理是[ ]

A．有性生殖

B．无性生殖

C．克隆技术

D．转基因技术

补全对话。

A: Hello!

B: Hello! 1_____ Jane?

A: Sorry, she 2_____ at the moment. Who's that speaking?

B: 3_____ Tony, Iane's classmate. I'm calling to tell her something important.

A: Well, can I 4_____?

B: Yes. Please tell her our class are going to clean up the Olympic Park tomorrow.

    We're going to meet at the school gate at 7:30 a.m.

A: Anything else?

B: No. Thank you very much.

A: 5_____.

1. 贵州的汞储量居世界第三位，主要分布在贵州东部，分10个汞矿带12个汞矿田，其中以万山、务川、铜仁、丹寨、松桃及兴仁槛木厂等矿田为主。

贵州的汞矿污染主要来自汞矿开采和冶炼、燃煤和化工工业三个方面。典型汞污染区务川汞矿现年产精汞80～120吨左右。大平矿区自生产以来，累积总排放汞量约为185吨(含汞废气、工业废渣和废水)。如果按年生产量100吨计算，务川汞矿每年将以渣、水、气的排放形式，向环境排汞共620.5公斤。是典型的汞污染区。贵州汞矿是国内最大的汞和汞系列产品的生产基地，在五十至八十年代中期，年产汞量平均为800吨/年，冶炼后的废渣排放量达47.6万吨/年，还未包括矿石。其冶炼厂的尾气沿直径为1米，长为400米的爬山烟道，以4600立方米/小时的流量向大气进行无序排放。由于工艺需要，机选厂和冶炼厂的两个废水排口，耗水量约为800吨/天。两厂排口的下游，一个是龙江水库，一个是下溪河上游，河水直接流人锦江，最后汇入洞庭湖并流人长江。龙江水库是万山特区最大的农用灌溉水源地，灌溉面积约8000亩。下溪河两岸周边有约4000亩稻田，居住着8000多人。

随着“西电东送”步伐的加快，贵州火力发电耗煤量呈逐年上升趋势。据统计，1996～2000年间，火力发电耗煤量由636.72万吨上升到895.62万吨。预计2010年，贵州火力发电用煤量将达到3568.30万吨/年，若按煤的平均含汞量0.62毫克/公斤计算，发电厂每年的气汞排放量就达到约22吨/年，而国家环保总局的总量控制目标是 800公斤/年。

清镇电厂年产废渣量为90万吨左右，其中粉煤灰产生量为80万吨，灰渣场建在红枫湖边上，离积水水面仅10米。由于采用水力冲灰排入灰场，灰水排量为800万立方米/年左右，电厂烟囱冬季烟尘的扩散方向，主要随主导风刮向湖区。而红枫湖又是贵阳市的主要饮用水源地之一。

汞的利用给环境也会带来污染。贵州省有机化工总厂在1971到1997年间，在汞法醋酸生产过程中，向贵阳市的主要饮用水源百花湖上游河段东门桥河流域、猫跳河以及周边农田排放的汞多达100多吨。

通过大量的调查研究，环科院证实清镇地区受汞污染的土壤有117.4公顷，土壤中含汞量在4.71～723毫克/公斤范围，含汞量在200毫克/公斤以上的土壤有66公顷必须紧急处理。厂周边环境受到了不同程度的汞污染，水底含汞量达76.9%，大米含汞量在0.03～0.13毫克/公斤范围，还含一定的甲基汞，均超过国家食品标准。鱼中的汞含量接近或高于我国食品中控制汞含量的标准值。

2．贵州省环境科学研究设计院通过大量调研显示，汞矿区和化工厂周边，由于汞的迁移，汞对环境不仅造成污染，并且还会进入食物链，而汞一旦进入食物链，就会造成动物神经系统的损伤，给动物及人类带来极大危害。

环科院通过小白鼠实验，结果表明，用被汞污染的粮食喂养小白鼠，小白鼠的神经递质在脑、肝、肾、血中都有明显损伤和变异。汞对乙酰胆碱的影响在短期内可能有刺激作用，而长时间的积累，最终结果将是耗尽细胞内的乙酰胆碱积蓄，从而导致胆碱能神经递质功能的全面衰退。乙酰胆碱与机体运动、学习、记忆等生理功能有着密切关系，胆碱能神经功能的破坏，可能导致生物体记忆功能衰退，运动协调性降低，这也与甲基汞导致的中毒症状类似。

环科院副院长瞿丽雅介绍说，污染土壤中的汞能在没有水的条件下向大气中散发，在有水的条件下溶出，成为二次污染源。土壤被汞污染，含汞量在180毫克/公斤以上，经过了6年的自然净化，日晒雨淋、杂草丛生，也未能降低汞对复垦稻田中大米的汞含量，严重损坏了人们赖于生存的环境。大面积土壤中的汞，溶出后将会扩散污染，侵入水体和水生生物。 　　在调查研究中，环所院所研究的电厂、采冶汞区，在距烟囱1000米处，均有人群居住。如果1人每天呼吸20立方米空气，则被动吸人汞10微克/天，如果1人每天摄入500克大米，则被动吃进汞107.3微克/天。如果研究均采用极端数据，由于环境中的汞污染造成污染源周边人群暴露，一年至少有7.18毫克/克汞进入人体体内(仅呼吸和粮食)，一旦积累到一定程度，将会造成人体健康疾病。

贵州有机化32,总厂排放废水口下游，拥有猫跳河流域中一个面积为319平方公里的人工湖――百花湖。该湖是集发电、饮用、养殖和灌溉等多功能为一体的水库。库中的鱼含汞量在0.16～0.96毫克/公斤，库中的底泥含汞量在19.7～62.1毫克/公斤。这个地区居住着近50万人。虽然该厂目前准备对生产工艺进行改造，污染源已切断，但已经严重污染的土壤如不及时治理，有可能会成为二次污染，污染其它稻田和地下水。

清镇市受汞污染的地区，大牲畜骨瘦如柴，抽查村民头发，其含汞量均偏高。当地村民也知道土壤受含汞废水的污染，因此当地村民生产的稻米、蔬菜均以低价尽量卖到周边地区，然后，再买回不含汞的大米蔬菜。并且在出售稻米和蔬菜时，还不流露出自己的住址与生产地。由于受含汞废水的影响，当地粮食、蔬菜等作物年平均减产3～4成。到目前为止，汞废水污染面积达177.4公顷，需采取紧急对策，即重污染土壤面积为60公顷，土层深度达50厘米。实验研究证明，作物对汞的富积，人类可通过食物链，将汞输入人体，在蓄积到一定程度时会造成极大危害。

不仅如此，贵州汞矿采冶、汞化工工业都地处在长江流域上游的乌江干流和洞庭湖水系，废渣、废水和被汞污染土壤中汞的不断排人、渗出，进入河水，不断迁移，将会对长江、三峡库区水质带来一定的影响。中科院的一份研究报告指出，乌江水质已受到务川汞矿的影响，洪渡河的鱼体汞含量都很高，甲鱼汞含量0.458毫克/公斤，鲤鱼0.613毫克/公斤，均超过国家食品卫生标准。江滨小渡口断面的底泥汞含量高达10毫克/公斤，将会直接影响三峡库区水质及水环境。

就给定材料所反映的主要问题，用1200字左右的篇幅，自拟标题进行论述。要求中心明确，内容充实，论述深刻，有说服力。

Perhaps only a small boy trained to be a wizard at the Hogwarts School of Magic could cast a spell so powerful as to create the biggest book launch ever. Wherever in the World the clock strikes midnight on June 20th, his followers will flock to get their paws on one of more than 10m copies of "Harry Potter and the Order of the Phoenix". Bookshops will open in the middle of the night and delivery firms are drafting in extra staff and bigger trucks. Related toys, games, DVDs and other merchandise will be everywhere. There will be no escaping Potter mania.

Yet Mr. Potter’s world is a curious one, in which things are often not what they appear. While an excitable media (hereby including The Economist, happy to support such a fine example of globalization) is helping to hype the launch of J. K. Rowling’s fifth novel, about the most adventurous thing that the publishers have organized is a reading by Ms. Rowling in London’s Royal Albert Hall, to be broadcast as a live web cast.

Hollywood, which owns everything else to do with Harry Potter, says it is doing even less. Incredible as it may seem, the guardians of the brand say that, to protect the Potter franchise, they are trying to maintain a low profile. Well, relatively low.

Ms. Rowling signed a contract in 1998 with Warner Brothers, part of AOL Time Warner, giving the studio exclusive film, licensing and merchandising rights in return for what now appears to have been a steal: some $ 500,000. Warner licenses other firms to produce goods using Harry Potter characters or images, from which Ms. Rowling gets a big enough cut that she is now wealthier than the queen--if you believe Britain’s Sunday Times rich list. The process is self-generating: each book sets the stage for a film, which boosts book sales, which lifts sales of Potter products.

Globally, the first four Harry Potter books have sold some 200m copies in 55 languages; the two movies have grossed over $1.8 billion at the box office.

This is a stunning success by any measure, especially as Ms Rowling has long demanded that Harry Potter should not be over-commercialized. In line with her wishes, Warner says it is being extraordinarily careful, at least by Hollywood standards, about what it licenses and to whom. It imposed tough conditions on Coca-Cola,. insisting that no Harry Potter images should appear on cans, and is now in the process of making its licensing programmed even more restrictive. Coke may soon be considered too mass market to carry the brand at all.

The deal with Warner ties much of the merchandising to the films alone. There are no officially sanctioned products relating to "Order of the Phoenix"; nor yet for "Harry Potter and the Prisoner of Azkaban", the film of the third book, which is due out in June 2004. Warner agrees that Ms. Rowling’s creation is a different sort of commercial property, one with long-term potential that could be damaged by a typical Hollywood marketing blitz, says Diane Nelson, the studio’s global brand manager for Harry Potter. It is vital, she adds, that with more to come, readers of the books are not alienated. "The evidence from our market research is that enthusiasm for the property by fans is not warning.\

It can be concluded from the last paragraph that（）

A. products of Potter films have brought enormous profits to Warner

B. current Hollywood’s marketing of Potter may damage its potential

C. readers could get tired of Ms. Rowling’s writings sooner or later

D. Warner will maintain the same strategy with Potter in future

邓 * * 对外开放思想所回答的基本问题是在建设中国特色社会主义的新的历史条件下如何( )

A．正确看待和利用外部经济条件
B．正确处理资本主义和社会主义的关系
C．利用资本主义建设社会主义
D．战胜和取代资本主义