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2010年元旦过后，美国科幻大片《阿凡达》在全国各大影院上映，影片讲述了地球人类试图从遥远的潘多拉星球（离太阳大约4.4亿光年）开采矿产资源以解决地球的能源危机而与“纳美人”（潘多拉星球上的土著人类）发生一系列矛盾冲突的故事。据此完成题。影片中地球人在“潘多拉”星球行动时需要带氧气罩，证明其大气不适合人类呼吸，下列与地球大气有密切关系的是（）
A
地球的质量和体积适中
B
地球的昼夜更替周期适中
C
地球与太阳的距离适中
D
地球自转周期适中
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根据以下材料回答题： Age DiscriminationBy the year 2000 nearly half the workforce in Europe are over 40 and yet throughout Europe there is a deep ambivalence ( 犹豫 )-if not outright suspicion-towards the capabilities of older workers.Those over the age of 40 generally take longer to find new employment, but European governments have done little to protect their employment rights. Only Germany, with incentives to business to encourage the employment of older people, and France, with the introduction of legislation making it illegal to use age barriers in recruitment-or to make employees redundant because of their age done anything substantive to combat age discrimination.Yet even in these two countries, there has been no noticeable improvement in the lot of the older workers; indeed, in France, job advertisements flout ( 轻视，反对 ) the law openly by asking for applicants of a certain age. So, should France and Germany be tightening up their laws and should the rest of Europe follow suit?Bill Robbins, a careers consultant said, "Legislation against age discrimination has been in existence for well over ten year in the U.S. and Canada, but has had no effect. Employers will always be able to find some reasons for turning down an older applicant without appearing to break the law."Ironically, it was governments which played a leading role in hardening business culture against older workers in the first place. In the late 1970s, many European countries were extremely concerned about the levels of youth unemployment, and France, Germany and Belgium even initiated incentive schemes for businesses to encourage older employees to take early retirement provided that younger trainees were taken on in their place. As more and more employees took early retirement, often willingly, a new, youth-oriented culture permeated business throughout most of Europe-even in those countries that had taken no active measures to promote it.Demographic ( 人口统计学的 ) trends mean that governments are now anxious to slow down the policy of early retirement as they realize that they simply do not have the funds to meet their pension promises. But reversing business attitudes is no easy matter. Dianah Worman a policy adviser said, "There is a widely held belief that older people are less, adaptable and trainable. This is just not true: research has shown that differences in capability are as wide within age groups as they are between them."Which of the following words can best describe the European attitude to older workers?
由于调查所获得的数据与其真值之间不-致造成的误差是（）。
汉代陆路边关负有依照政府法令，对中外进出境人员和事务实施严格管理的重要职责，其职责为（）。
20年以来我们削减的主要是二氧化碳污染物排放的增量。
杖的种类有（）