问题 不定项选择

页岩气是指赋存于页岩中的非常规天然气,往往分布在沉积盆地的烃源岩地层中,随着常规油气资源的日益紧缺,页岩气资源日益受到各国的重视,但是由于目前的页岩气开采技术会导致(),因此如何时最大限度减少环境影响,是友好开采页岩气面临的主要难题。

A.水资源大量消耗 

B.空气污染严重,雾霾天气增加 

C.有可以污染地下水 

D.植被受到严重破坏、生物多校性减少

答案

参考答案:C

解析:

解析

页岩气,是从页岩层中开采出来的一种非常重要的非常规天然气资源。页岩气的形成和富集有着自身独特的特点,往往分布在盆地内厚度较大、分布广的页岩烃源岩地层中。较常规天然气相比,页岩气开发具有开采寿命长和生产周期长的优点,大部分产气页岩分布范围广、厚度大,且普遍含气,这使得页岩气井能够长期地以稳定的速率产气。页岩气开采可能导致气井周围半径一公里范围内的饮用水被甲烷、乙烷和丙烷污染。故正确答案为C项。

考点:自然常识

单项选择题
填空题

Before you speak to any audience, you should learn as much about its members as possible. Only in that way can you best adapt the level of your language and the content of your talk to your listeners.

41. Speaking to someone you know well.__________

Where are you likely to speak Certainly, in this class you’ll give several talks, and since you know most, if not all, of the students, you should face no major problems in adapting your approach to them. Another speaking possibility exists in your workplace.

A third speaking possibility exists in any organization (social, cultural, athletic, and so on) that you belong to. You may be asked to speak at the next meeting or at the annual banquet. Here again, you know the people involved, their background, their education level, and their attitudes, and that’s a tremendous advantage for you. Since we’re upbeat and positive in this course, we’ll assume that you’ve given successful talks under all three circumstances, and with this course under your belt, you can do it again. Since good speakers are hard to find and word about them travels fast, suppose that one day you get an invitation to speak to an organization in which you don’t know a soul. What do you do now If you feel able to handle the topic you’re asked to speak on, accept this rare challenge. Here’s where audience analysis comes into play. Be sure to ask the person who invited you for information on the members, information that encompasses a broad spectrum, such as in the following areas.

42. How old are your listeners

43. Sex composition of your listeners.

44. Interest in topic.__________

45. Interests or hobbies of the listeners.__________

[A] If you’re invited to speak to a women’s or men’s organization, you know the answer to this question at once. Quite often, however, audiences are mixed fairly evenly, although at times one sex may predominate.

[B] Do members of your prospective audience spend evenings watching TV movies and drinking beer at a local tavern, or do they read the Harvard Classics and attend concerts of Beethoven and Mozart Do they play bingo and 21, or do they pursue the questions the intriguing intricacies of contract bridge and chess Answers to these questions can help you choose the most appropriate material and language for your audience. Your choices can be crucial in determining the success or failure of your presentation.

[C] Are the members recent college graduates, senior citizens, or business executives in midcareer Just remember, age exerts a powerful impact on people’s attitudes, values and motivations.

[D] For example, your department manager may ask you to explain and demonstrate a procedure to some fellow employee. Or she may select you to address your department on behalf of the local blood donor drive. In both speech situations—in class and on the job—you’re familiar with your audience; you speak their language; you have things in common with them.

[E] Are you aware of the educational background of your audience How many of them have doctoral degrees, master degrees or bachelor degrees This will decide what kind of language you should adopt and how much they can understand.

[F] Are the members of the organization interested in the topic or are they required to attend regardless of their interest If the latter is true, what types of material will most likely pique their curiosity

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