题干

23.____ 霾是悬浮在大气中的大量微小尘粒、烟粒或盐粒的集合体,使空气混浊能见度降低,尤其是PM2.5(大气中直径小于或等于2.5微粒的颗粒物)被认为是造成雾雾霾天气的“元凶”.

(1)霾影响最大的就是人的呼吸系统.人体进行呼吸的主要器官是 ,呼吸道不仅是气体进出的通道,而且还能清洁呼入的气体,但PM2.5却不易被清除,它们进入人体肺后会干扰 与血液之间进行气体交换,引发呼吸系统疾病.

(2)霾天气时,空气流动性差,有害细菌和病毒向周围扩散的速度变慢,导致空气中病原微生物浓度增高,传染疾病传播的风险增高.传染病在人群中的传播必须同时具备 、 和易感人群三个基本环节.外出活动时戴口罩属于预防传染疾病措施中的

(3)中药板蓝根对感冒病毒有抑制作用,从如图的“板蓝根颗粒说明书”中可知该药是 .(填“处方药”或“非处方药”).有人认为“中药无副作用”,为了预防感冒,他每天都喝板蓝根冲剂.这种做法是否合理? ,请说明你的理由:


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    The word advertising refers to any kind of public announcement that brings products and services to the attention of people. Throughout history, advertising has been an effective way to promote(促进)the trading and selling of goods. In the Middle Ages, merchants employed "town criers" to read public messages aloud to promote their goods. When printing was invented in the fifteenth century, pages of advertisements(ads)could be printed easily and were either hung in public places or put in books.

    By the end of the seventeenth century, when newspapers were beginning to be read by more people, printed materials became an important way to promote products and services. The London Gazette was the first newspaper to set aside a place just for advertising. This was so successful that by the end of the century several companies started businesses for the purpose of making newspaper ads for merchants.

    Advertising spread quickly throughout the eighteenth century. Ad writers were starting to pay more attention to the design of the ad text. Everything, from clothes to drinks, was promoted with clever methods such as repetition of the firm's name or product, words organized in eyecatching patterns, the use of pretty pictures and expressions easy to remember.

    Near the end of the nineteenth century, companies that were devoted to the production of ads came to be known as "advertising agencies(广告商)."The agencies developed new ways to get people to think of themselves as members of a group. Throughout the twentieth century, advertising agencies promoted consumerism(消费主义)as a way of life, spreading the belief that people could be happy only if they bought the "right" products.