题干

关于一个自发进行的放热反应,且属于氧化还原反应.下列叙述正确的是(   )

A:反应不需要加热即可进行反应

B:反应物的总能量低于生成物的总能量

C:反应物的总键能高于生成物的总键能

D:理论上可以使该反应的化学能直接转化为电能

上一题 下一题 0.0难度 选择题 更新时间:2018-11-12 09:32:02

答案(点此获取答案解析)

D

同类题1

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

     The idea of inventing an international language is not a new one. Over the past 180 years, linguists (语言学家) have created over ten different languages that are based on German, Spanish, and English. One of these was Basic English.

     By 1923 the First World War had been over for five years, but Europe was still recovering from its effects. Charles Kay Ogden, a linguist and writer, was running several bookshops in Cambridge. He published The Meaning of Meaning (1923), a book describing how we use language. The book received high praise, which drove Ogden to design an international language — something that was much simpler than English. In 1930 Ogden's book Basic English: A General Introduction with Rules and Grammar was published.

     Perhaps it takes about seven years for one to become a good English speaker. Ogden believed that Basic English could be learned in seven weeks. There were only 850 words and the grammar was very simple.

     The language attracted the attention of educators all over the world, but its development was stopped by the Second World War. After the war, both the British Prime Minister Winston Churchill and the President of the United States Franklin D. Roosevelt looked for ideas that might bring world peace. They both gave speeches that encouraged the use of Ogden's international language. In the past 60 years, the language has had some success. In some parts of East Asia, teachers are still using Ogden's word lists.

     However, in the main, the language has disappeared. Because there are many more non-native than native speakers of English, recently some linguists have asked whether we should give careful consideration to Ogden's ideas again. And the Wikipedia website (www.wikipedia.org) has started a version (版本) written in Basic English for non-native learners of the language. Search for it on the Internet now!