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一个人从饮食中摄入的胆固醇和脂肪越多，他的血清胆固醇指标就越高。存在着一个界限．在这个界限中，二者成正比。超过了这个界限，即使摄人的胆固醇和脂肪急剧增加，血清胆固醇指标也只会缓慢地有所提高。这个界限对于各个人种是一样的，大约是欧洲人均胆固醇和脂肪摄人量的1/2。 可见：
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Passage Two Is the customer always right The answer, it seems, depends on which country you are in. Shopping is very much a part of a country’s culture, and attitudes to shopping and consumers vary from country to country just as much as climate or taste in food. From the air-conditioned American shopping centers to the street market of African towns, the way we shop shows the way we see ourselves and our relationships with other people. Business competition in Europe has given consumers increased power. This has meant falling prices, plenty of special offers and a re-examination of what customer service really means. People often point to America as an example of excellent customer service. In restaurants in the south of the USA, for example, waiters compliment you on your clothes, ask about your day, compliment you on the wisdom of your order and then return every ten minutes to refill your glass and make sure that everything is to your satisfaction. Anyone who has waited 30 minutes to be served in a restaurant might well dream of such attention, but do Europeans really want US style service？As a friend of mine once told me,” By the end of the evening I had spent as much time talking to the waiter as to my wife.” It is a question of expectations. Different nationalities expect different types of service. A Chinese-American friend loves telling people about how her Chinese mother shops for clothes. “First of all she waits until they are on sale, then she bargains until she gets an even better price and then she finds some small fault with the product and demands a further reduction. She never buys anything at the regular price.” Could you imagine trying such tricks in a department store in your country Attitudes to service are, of course, affected by employers’ attitudes to their workers. As American sales and service personnel are heavily reliant on commission and tips, they have more motives to provide more service. But is this fair Do we think it is fair to ask shop assistants to work late evenings, Sundays and 12 hour shifts It might not be a case of “Is the customer always right” but a case of “How much service is it fair to expect” Why does the author use the Chinese mother’s shopping experience as an example
根据下列材料回答116—120题： 以下是反映我国人才资源现状的一些数据：在高层次人才方面，两院院士由刚建院的233人和96人，发展到2003年的688人和663人。在教育科技人才方面，2003年中国科技人员总数达320多万人，比1993年增长近1/3。从我国专业技术人才队伍的学历来看，从1999年到2003年本科人才的比例由18．1％上升到24．2％。从全国的国有企事业单位专业技术人员的变动来看，1990年国有企事业单位总人数为9443万人，到2003年降到5575万人，但是，专业技术人员总数却由1080．9万人增长到2174万人。以平均每万名职工中拥有专业技术人员的比例来看，1990年为1144．7人，到2003年增为3899．5人。 在全国29个专业技术系列中。高级职称以上的高层次人才总计为157．3万人，仅占人才总量的5．5％。 目前，我国企业专业技术人员比例偏低，仅占35％，远低于美、英的80．8％和61．4％。我国高级技工占职工总数的比重仅占5％，西方发达国家这一比例超过35％。 以下判断不正确的是：
交通肇事与道路的关系相当于( )与( )
根据短文回答46—50题： 近年来，在众多城市和工厂密布的珠三角地区，天空经常灰蒙蒙一片，大气能见度很差。 很多市民可能并不清楚，棕色云团正是能见度下降的“罪魁祸首”：棕色云团中的一些微小颗粒，会吸收阳光，或者将部分阳光反射回大气。 联合国环境规划署的棕色云团报告就显示．自上世纪70年代以来，广州的日光强度已经下降了五分之一以上。 北京大学环境系教授张远航及其同事在珠三角地区进行的研究表明，珠三角空气有很多污染物，其中那些粒径小于2．5微米的细颗粒物(PM2．5)，是造成能见度衰退的主要因素。而中国现行的空气质量国家标准中，却没有关于PM2．5的规定。我们每天在电视上或者报纸上看到的空气质量日报中所谓的“可吸入颗粒物”，仅指那些粒径小于10微米的颗粒物(PMl0)。 联合国环境规划署的报告指出，每立方米：PM2．5的浓度如果上升20微克的话．中国和印度每年就会有约34万人死亡。即使按照折中的估计，棕色云团相关的PM2．5所致经济损失．也将分别占到中国GDP的3．6％以及印度GDP的2．2％。 除了影响空气质量和人类健康，棕色云团还可能影响气候。在很多情况下，棕色云团与全球不断增加的温室气体交织在一起，正在对区域乃至全球气候系统产生极大影响。 此外，棕色云团的成分非常复杂。其中硫酸盐等多种成分可以降温。而黑碳的成分正在加速喜马拉雅等地冰川的融化速度，因为黑碳沉降在冰雪上，会使冰雪颜色变暗，吸收热量的能力增强；黑碳还会加热空气。这些因素，都使得冰川融化加速。 然而，棕色云团对整个气候系统带来的影响，实际上比这复杂得多。它可以通过反射阳光和吸收热量减缓全球气温上升的幅度。如果棕色云团一夜之间消失。全球气温可能迅速上升多达2度，而这正是一些科学家认为地球还能容忍的最大升温幅度， 根据文章内容，下列说法正确的是：
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