题目

听下面一段较长对话，回答以下小题。【1】How many people are working on the project?A.Four. B.Five. C.Six.【2】What will the woman do next?A.Talk with the manager. B.Have a meeting. C.Work on the project. 答案：【答案】【1】C【2】A【解析】【原文】W: I'm having trouble with my job, Bob.M: What is the problem?W: I have been asked to work with five other people on a project. The project is not difficult, but no one is working together on it because there is no one in charge.M: Why don't you apply to be the leader? Then you should call everyone together for a meeting W. Good idea. Ill talk wi如图是制备乙酸乙酯的实验装置，圆底烧瓶中应装有浓硫酸、醋酸、乙醇和沸石，烧瓶上接有球形水冷凝器。小心加热，使烧瓶内的液体不沸腾，反应一段时间后将烧瓶内液体倒入装有饱和碳酸钠溶液的锥形瓶中，瓶中的无色液体分成两层。 （1）球形水冷凝器的作用是________； 球形水冷凝器与普通的直形水冷凝器相比，具有的优点是________；冷凝器a口是冷却水的________（进口或出口）。 （2）分离锥形瓶中的液体应用（填入仪器名称）。 （3）若从锥形瓶中取试样，在其中加入少量碘片，将在________层液体中显红棕色，原因是________。 （4）若从锥形瓶中取试样，在其中滴加几滴高锰酸钾的酸性溶液，发现水层中的紫红色逐渐褪去，原因是________。