问题
单项选择题
A.( Socially-minded people
B.( Scientists and intellectuals
C.( Mediocre writers
D.( Friendly companions
答案
参考答案:B
解析:[听力原文]Who are more likely to be concerned with things rather than people
A.( Socially-minded people
B.( Scientists and intellectuals
C.( Mediocre writers
D.( Friendly companions
参考答案:B
解析:[听力原文]Who are more likely to be concerned with things rather than people
根据反应事实可以推出影响化学反应的因素,下列推理中不合理的是( )
选项 | 化学反应事实 | 影响因素 |
A. | 蜡烛在纯氧中燃烧的火焰比在空气中燃烧的火焰更明亮 | 反应物浓度 |
B. | 煤粉比煤块燃烧的更加剧烈、更加充分 | 反应物种类 |
C. | 碳在常温下不与氧气反应,点燃时能与氧气反应 | 反应温度 |
D. | 双氧水在通常情况下难分解,加入二氧化锰后迅速分解 | 催化剂 |