题干

入冬以来,我国北方冬小麦主产区常受旱严重,为了缓解北方旱情,借助于冷湿气流,我国北方各省市纷纷采取人工增雨。人工增雨是利用云层中的水汽,人工创造成雨条件,形成降雨。这说明(  )

A:发挥主观能动性是尊重客观规律的基础

B:人们可以创造规律利用自然

C:人们可以根据意愿改变规律趋利避害

D:人们可以根据自然规律改变条件为人类造福

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答案(点此获取答案解析)

D

同类题1

One thing that British and Chinese cultures share is a love for fine tea. Today, when we think of western tea culture, we often think of the English and beautiful china cups.

  Afternoon tea

  People believe that an English lady, Anna, first introduced the idea of afternoon tea. In the 18th and 19th centuries, the English are only two main meals each day ----breakfast and a heavy dinner that would last several hours in the evening. As a result, people often got very hungry during the long wait between these two meals. To solve this problem, Anna came up with the clever idea of inviting some friends to join her for an afternoon meal between four and five o`clock. This meal included cakes and sandwiches, and tea was served to wash down the food. In order to make this afternoon meal important,  fine china cups and plates, and silver teapots, forks and spoons were used. Soon, afternoon tea parties became popular social occasions. Today, afternoon tea parties continue to play an important part in the social life in the modern Britain.

  Will you come for coffee?

 Coffee also has an important role in British culture. People often use the words “Will you come for coffee?”to mean "Would you like to come to my home for a chat?" Normally, several different drinks such as tea, hot chocolate or a soft drink like orange juice will be served as well as coffee, and you will be asked what you would like. However, you will not normally be offered wine at a “coffee" party.

  Coffeehouses and the London Stock Exchange(股票交易所)

  In the 17th century London, coffeehouses were busy and noisy places. Businessmen and bankers went to coffeehouses to do their business, as well as to drink coffee. In fact, the London Stock Exchange is believed to have started from these coffeehouses.

同类题5

阅读下面文章,回答小题。
                                                                                      电子纸开启阅读新时代
      ①自从东汉蔡伦发明造纸术直到今天,纸一直是最主要的阅读载体。纸质媒体有很多优点:一是反射低,视觉感舒适;二是亮度高;三是反差大,分辨率高,看每一个字都特别清楚;四是视角广。另外,图文印刷后有永久性,印刷上去之后不再耗电和油墨。最后一点是纸质媒体轻便,可卷曲。随着电子技术的发展,特别是网络的发达,使纸质媒体暴露出信息量有限,不能动态查询的缺点。但人们仍然习惯于纸质阅读,主要是人类遗留下来的习惯。
      ②目前,已有许多人通过液晶显示屏等阅读器进行阅读,但是,从阅读是否舒适的角度看,液晶显示屏和纸张相比差别实在是太大了,液晶显示屏必须得有背景灯,长时间阅读会导致眼睛疲劳;而电子书阅读器通常采用反射式液晶屏,反差程度较低,亮度也不是很好。
      ③电子纸是解决上述问题的一种选择,电子纸利用电泳显示技术原理发明而成。在电场的作用下,黑白两种不同的颗粒不停运动,当白色的颗粒上升到上表面时,所有的环境光照射到上表面被完全反射,这样就形成了白色的状态,也就是纸的状态;当交换电极后,两种颜色的颗粒会交换位置,这样白色的颗粒就可以到下面去了,黑色的颗粒就到上面,光被黑色的颗粒全部吸收,结果就导致黑色,也就形成了黑白显示。另外,在上表面也可以有混合的状态,两种不同的颗粒成比例的混合,这样可以形成黑白及有灰度层次的不同颜色。
      ④目前的电子纸已经能够做出与传统纸张相近的薄厚及外观,有着与印刷品一样的质感,并且初具传统纸张的一些特性:亮度和分辨率较高,可在自然光下阅读,室内外均有较好的易读性;视角广,可从各个角度阅读;重量小,便于携带,适合移动阅读等。
      ⑤电子纸还有传统纸张不具备的优点:其呈现的内容不固定,它能随意存取、多次使用大量阅读材料,且便于检索。在电子纸上多次写入内容有两种方式:一种是用手直接写入,另一种是用复制的方法(包括网络下载)来刷新内容。只要你随身携带电子纸,还可以随时随地通过网络查询、下载各种信息。此外,电子纸可调节字体大小,保护视力,图文刷新后不耗电,节能。这种新技术也会带来很多有益的社会影响。例如,大大降低传统纸张的使用量,从而减少树木的砍伐,大大减少发行和运输的费用等。
      ⑥虽然有上述很多优点,但目前电子纸还不完善:一是电子纸不能显示彩色内容;二是不能弯曲、折叠;三是其内容资源比较贫乏,需要更多的内容提供商,包括报纸、期刊、图书出版等行业都在电子纸平台上出售内容产品,并实现版权保护,共同来丰富电子纸的内容资源。