题目

听下面一段较长对话，回答以下小题。【1】What will the man do in the late afternoon?A.Give a speech. B.Write a magazine article. C.Prepare some materials.【2】Where will the man have dinner tonight?A.At home. B.In the office. C.In a meeting room.【3】How will the man go back home?A.By bus. B.By car. C.By taxi. 答案：【答案】【1】C【2】A【3】B【解析】【原文】M: I have such a busy day today. I don’t know when I’ll be home. Can you pick up our son from school today?W: Oh, you have to speak at the High School of Science and Technology today?M: That’ll be finished by 3 o’clock. But then I have to go to the office and prepare my notes for my speech at the Computer Society’s annual dinner20．下列说法正确的是（　　）A．润洗酸式滴定管时应从滴定管上口加入3～5mL所要盛装的酸溶液，倾斜着转动滴定管，使液体润湿其内壁，再从上口倒出，重复2～3次B．用惰性电极电解MgCl2溶液的离子方程式为：2Cl-+2H2O$\frac{\underline{\;电解\;}}{\;}$Cl2↑+H2↑+2OH-C．为验证盐桥的作用，在两个烧杯中分别盛适量硫酸亚铁铵溶液和稀酸性高锰酸钾溶液，分别插入石墨棒用导线与电流计相连，然后用装有K2SO4饱和溶液的琼脂的U型管两端插入两个烧杯中，电流计偏转，一段时间后高锰酸钾溶液褪色D．嫦娥三号月球车玉兔号在进入第二个月夜休眠前，出现了机构控制异常情况，其病因或为月尘，即月球上直径小于10微米的浮尘，月尘分散在空气中形成的分散系属于胶体