(2022·江苏省前黄高级中学高二开学考试)Whenhydrogen(氢气)burns,theonlybyproductiswater—whichiswhyhydrogenhasbeenanattractivezero-carbonenergysourcefor decades.Yetthetraditionalprocessforproducinghydrogen,inwhichfossilfuelsareexposedto steam,isnotevenremotelyzero-carbon.Hydrogenproducedthiswayiscalledgrayhydrogen;if...
one of the most serious issue is the gray population. Nevertheless, the significance of elderly people in society cannot be overstated. As the population ages, it is imperative that we acknowledge and appreciate the contributions and...
thatlightcandamageoureyesundercertaincircumstances,there?snoscientificevidencesuggestingthatbluelightisharmfultooureyes.But manypeoplestillthinkitis,whichiswhybluelight-blockingglassesaresopopular.Sodothe glasseswork? “Everyoneisveryconcernedthatbluelight maybecausingdamagetotheeye,butthere?sno evidencethatitmaybeca...
What is the true meaning of the term? More importantly, what is conveyed through it? NEW GROWTH DRIVERS It was in Northeast China that Xi first proposed the concept of new productive forces during an inspection and research trip. The term's birthplace was no coincidence. Despite the Northeast...
1. What is the news report mainly about? 2. When did the incident occur? Questions 3 and 4 will be based on the following news item. 参考答案: 1. B 2. C Questions 5 to 7 are based on the news report you have just heard. ...
31.Which of the following is NOT true? A. The high price of building reservoirs is making the situation worse. B. Population growth is the main reason for water shortages. C. Global warming could increase the long-term water shortfall to 1,815 billion cubic metres. ...
Tourism in underdeveloped nations is gaining wide popularity these days due to governments’ great efforts to advocate and expand this kind of tertiary industry. However, despite the rising figures in the annual revenues, I do not regard it as a positive development in the long term, especially ...
Fusion Energy Science Quick Facts Fusion offers a potential long-term energy source that uses abundant fuel supplies and does not produce greenhouse gases or long-lived radioactive waste. Fusion releases energy because the mass of its bound nucleus is less than the mass of it component protons an...
Of course, such growth may not persist in the long term—which is what Mr. 出自-2016年6月阅读原文 It is clear that consumers don't always know what they are getting. 出自-2016年6月阅读原文 I've been looking at what self-proclaimed experts were saying about unemployment during the Great...
During the ongoing "two sessions," Chinese President Xi Jinping emphasized the imperative to accelerate the implementation of the innovation-driven development strategy, saying that speeding up efforts to achieve greater self-reliance and strength in science and technology is the path China must take ...