【判断题】地下室采光井的深度视地下室窗台的高度面定,一般采光井底板顶面应较窗台低 250~300mm ()。
【判断题】与火电厂相比,水电厂生产过程复杂,环境污染严重,生产效率高。
【单选题】央视“春晚”两次唱响《常回家看看》这首歌曲。歌词劝诫忙碌奔波的人们不要忘记亲情,常回家看看操劳一生的“空巢老人”。但是近期英国某学院的一项调查却得出相反的结论:欧洲一些国家近年出现大批成年子女“归巢族”,给父母带来显著的负面影响。报告结论称:父母很享受子女离家后的独立生活,成年子女“回巢”对他们的退休生活是一种侵扰。这说明1人们对“空巢”与“回巢”的内涵有不同的理解和感悟2不同经济生活和文化背景对...
【单选题】H5N1 avian influenza, known commonly as bird flu, has killed at least 15 people across Asia and was confirmed in China on January 27. No human cases have been found in the mainland, but 13 of the coun...
【判断题】电子位移极化和离子位移极化可以看成为电场力和准弹性力平衡的结果
【简答题】平均偏差和标准偏差是用来衡量分析结果的____,当平行测定次数n<20时,常用____偏差来表示。< /div>
【简答题】H5N1 avian influenza, commonly known as bird flu (流感), has killed at least 15 people across Asia and was proved in China on January 27. No human cases have been found in the mainland, but 13 of the c...
【判断题】地下室采光井的深度视地下室窗台的高度而定,一般采光井底板顶面应较窗台低250~300mm