题目

除去下列四组混合物中的杂质(括号内为杂质)，可以用同一试剂或同一方法的是(    ) ①C2H2(SO2)  ②C2H2(H2S)  ③硝基苯(NO2)  ④溴苯(Br2)A.NaOH溶液               B.KMnO4溶液              C.盐酸             D.萃取 答案：解析：题中各有机物与NaOH溶液均不反应，各无机物与NaOH溶液均能反应。答案：A阅读理解。Dear Alfred,I want to tell you how important your help is to my life.Growing up, I had people telling me I was too slow, though, with an IQ of 150 at 17, I’m anything but stupid. The fact was that I was found to have ADIID(注意力缺陷多动障碍). Anxious all the time, I was unable to keep focused for more than an hour at a time.However, when something did interest me, I could become absorbed. In high school, I became curious about the computer, and built my first website. Moreover, I completed the senior course of Computer Basics, plus five relevant pre-college courses.While I was exploring my curiosity, my disease got worse. I wanted to go to college after high school, but couldn’t . So, I was killing my time at home until June 2012 when I discovered the online computer courses of your training center.Since then, I have taken courses like Data Science and Advanced Mathematics. Currently, I’m learning your Probability course. I have hundreds of printer paper, covered in self-written notes from your video. This has given me a purpose.Last year, I spent all my time looking for a job where, without dealing with the public , I could work alone, but still have a team to talk to. Luckily, I discovered the job—Data Analyst—this month and have been going full steam ahead. I want to prove that I can teach myself a respectful profession, without going to college, and be just as good as, if not better than, my competitors.Thank you. You’ve given me hope that I can follow my heart. For the first time, I feel good about myself because I’m doing something, not because someone told me I was doing good. I feel whole.This is why you’re saving my life.Yours,Tanis【1】why did’t Tanis go to college after high school?A.She had learned enough about computer scienceB. She had more difficulty keeping foucesedC.She preferred taking online coursesD.She was too slow to learn【2】AS for the working environment,Tains prefers____.A .working by herselfB.dealing with the publicC.competing against othersD.staying with ADHD students【3】Tanis wrote this letter in order to_____.A.explain why she was interested in the computerB.share the ideas she had for her professionC .show how grateful she was to the centerD.describe the courses she had taken so far