第5题: [单项选择]The middle of the 18th century was predominated by a newly rising literary form, that is the modern English______, which gives a realistic presentation of life of the common English people.
A. prose B. short story C. novel D. tragicomedy 参考答案:C
A. Nature and Essays. B. Representative Men and English Traits. C. Nature and English Traits. D. The American Scholar and The Divinity School Address. 参考答案:D 答案解析:真正为爱默生赢得声誉的是他在1837年和1838年发表的两篇演讲稿《美国学者》和《神学院演说》。
第30题: [单项选择]造钢材冷加工强化和时效后其______。 A. 强度提高 B. 韧性提高 C. 可焊性提高 D.塑性提高 参考答案:A 答案解析:[解析] 在常温下,钢材经拉、拔、轧等加工,使其产生塑性变形,而调整其性能的方法称为冷加工。冷加工后的钢材,屈服点和硬度提高,塑性降低,钢材得到强化。冷拉后的钢材,时效加快。若在常温下存放15~20d