题目

下列物质必须隔绝空气保存的是( )①Na ②Na2O ③Na2O2 ④NaOH ⑤NaCl A . ①②③④ B . ①② C . ②③④⑤ D . ①②③④⑤ 答案：A请阅读下面文字及图表, 并按照要求用英语写一篇 150 词左右的文章。"Please put your phone down Daddy, we haven't finished the story!" Hearing these heartfelt words from my four year old daughter was an uncomfortable wake up call. How had I let the shiny electronic box in my hand take so much of my attention that it could even interrupt a short bedtime story with my precious children?It's no exaggeration to suggest that our mobile devices are in danger of taking over our entire lives. Time magazine found that 68% of users take their devices to bed with them, 20% check their phones every ten minutes and one third report feeling anxious when briefly separated from their beloved gadget. According to Osterman research, 79% of respondents take their work-related device on vacation and 33% admit to hiding from family and friends in order to check Facebook and Twitter. It's hard to deny that these are worrying trends.【写作内容】用大约30字概括上文和图表的主要内容；结合上述信息, 用大约120字论述：（1）科技的发展是否意味着人们生活更幸福。（选择“是”或“否”并论述你的观点）（2）你认为在生活中应当如何处理人和科技的关系。【写作要求】1. 写作过程中不能直接引用原文语句; 2. 作文中不能出现真实姓名和学校名称; 3. 不必写标题。