题目: 写出下列物质的转化或分离方法(每一项只填写一种方法)。(1)把煤转化为焦炉气、煤焦油和焦炭等____________(2)将重油转化为汽油____________ (3)将海水淡化____________ 答案: (1)干馏(2)裂化(3)蒸馏
题型:单项选择题 某贸易公司.煤业公司.当地投资公司分4:3:3的比例共同成立一家化工公司。该化工公司的董事长由常住海外的贸易公司张某担任,总经理由贸易公司王某担任,全面负责生产经营活动,副总经理由煤业公司孙某担任,负责日常生产管理;安全总监由投资赵某担任,负责安全管理,依据《安全生产法》的规定,负责组织制定并实施该化工公司安全生产应急预案的是()A.张某B.王某C.孙某D.赵某 查看答案
题型:完形填空 阅读下面对话,从方框内7个选项中选择5个恰当的句子完成此对话。A. When will the concert begin?B. Sounds good! C. When and where shall we meet?D. I’ll see a movie.E. Could you please get there earlier?F. Yes. What’s up?G. Would you like to go with me? A: Hello, is that Wu Bin speaking?B: Yes. Who’s that?A: This is Tian Hong. Are you free this Saturday evening? ( )B: 小题1: . A: I’ve got two tickets to Jay Chou’s concert. ( )____小题2: . ( )B: Certainly, I’d love to. He’s my favorite singer. Thanks for your invitation. 小题3: . A: Let’s meet at the gate of the park at four o’clock.( )B: 小题4: I want to buy him a gift. A: OK. I’ll get there at three. Shall we go to the shopping center to buy the gift? ( )B: 小题5: See you then. A: See you. 查看答案
题型:多项选择题 用预压法处理软土地基时,除应预先查明土层分布、层理、透水层位置等,尚应通过室内试验确定的设计参数有( )。A.土层的给水度及持水性B.土层的前期固结压力,天然孔隙比与应力的关系C.水平固结系数,垂直固结系数D.三轴试验抗剪强度指标 查看答案