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The number of speakers of English in Shakespeare’s time is estimated (估计) to have been about five million. Today it is estimated that some 260 million people speak it as a native language, mainly in the United States, Canada, Great Britain, Ireland, South Africa, Australia and New Zealand. In addition to the standard varieties of English found in these areas, there are a great many regional and social varieties of the language as well as various levels of usage that are employed both in its spoken and written forms. In fact, it is impossible to estimate the number of people in the world who have acquired an adequate (足够的) working knowledge of English in addition to their own languages. The purpose for English learning and the situations in which such learning takes place are so varied that it is difficult to explain and still more difficult to judge what forms an adequate working knowledge for each situation. The main reason for the widespread demand for English is its present-day importance as a world language. Besides serving the indefinite needs of its native speakers, English is a language in which some of important works in science, technology, and other fields are being produced, and not always by native speakers. It is widely used for such purposes as meteorological and airport communications, international conferences, and the spread of information over the radio and television networks of many nations. It is a language of wider communication for a number of developing countries, especially former British colonies. Many of these countries have multilingual populations and need a language for internal communication in such matters as government, commerce, industry, law and education as well as for international communication and for entrance to the scientific and technological developments in the West.Which of the following statements is NOT true
关于应付款项的函证程序，下列说法不正确的是（ ）。
关于霍乱的描述正确的是（ ）。
重症中暑可分为四种类型：中暑高热、热痉挛、热衰竭和日射病
移动式空气填充泵二级汽缸的出口压力为（）bar。
下列关于受益人的说法不正确的一项是（）。
镜板研磨用研磨膏GR2O3的黏度为M5-M10
克罗恩（Crohn）病的并发症有（）。
为保证铁路桥涵安全，要限制人为因素造成桥址河床的下切，任何单位不得在桥长20～100m的中桥上下游（）范围内拦河筑坝，围垦造田，采集砂石以及修建其它工程设施。
在科尔伯格的有关儿童道德判断发展阶段的研究中，服从与惩罚取向阶段属于（）。
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向油舱内充填惰性气体所起的作用是：
（），应设惰性气体灭火系统、惰性气体灭火系统、惰性气体灭火系统之一的灭火系统。
经验表明大约用液货舱体积（）倍的惰性气体来量换舱内气体就可使该舱氧气含量降至最低可燃含氧量以下。
将惰性气体充填到油舱内的最终效果是能使得舱内惰化，即体积含氧量不超过：
原油洗舱时，货油舱必须施放惰性气体，使舱内含氧量低于（）。
原油洗舱时，货油舱必须施放惰性气体，使舱内含氧量低于（）。
装货时，不需要向舱内充注惰性气体。
洗舱时为防止发生（）爆炸事故，必须使用惰性气体，使舱内气体成分始终保持不会爆炸的状态。
油船装货时，应向货油舱内充注惰性气体。
惰性气体系统以任何所需的流速向液货舱输送惰性气体时，在惰性气体供气管内的含氧量（按容积计算）应不超过（）。