题目

— A: Hi! — B: The shoes are too small for me. I need a new one.A.Can I help you? B.What’s the matter?C.Nice to see you. D.Would you like to have a pet? 答案：【答案】B【解析】句意：A：嗨！怎么了？ B：这双鞋对我来说太小了。我需要一双新鞋。考查情景交际。A. Can I help you?我能为您效劳吗；B. What’s the matter?怎么了；C. Nice to see you.很高兴见到你；D. Would you like to have a pet?你想有一只宠物吗？根据语境可知，这是一个购物场景，B在买鞋试鞋，故C、D选项不某0.16 g饱和一元醇与足量的金属钠充分反应，产生56 mL氢气（标准状况）。求该饱和一元醇的分子式。