题目

如图所示是根尖的结构图。下列说法错误的是（) A . 去掉图中［C］，根不能再生长 B . 根生长最快的部位是图中的［B］ C . 根适于吸收的特点是［A］成熟区长有大量根毛 D . ［D］根冠细胞特别耐磨，开始分化形成新的组织 答案：DThree 1ago, my family got our first computer. 2the beginning of this summer, I found it was too old and I wanted to get a3one. After my father. and I talked for a long time, he4. We went to many shops and read many ads.5we bought an HP computer.During the first week, I noticed6our computer had some problems. I spent many hours7to fix it, but it8work. So I9to phone the HP compa­ny and ask them10to work out my problem. They told me to wait until the next morning because all their workers were11that day.The next morning two workers came. It took them many hours to mend it, but the computer12 did not work. My dad had no other way but to return the whole thing.A few days later, we decided that I should go on the Internet and order some parts to build a new computer by13.It was not an easy job for me to build a new computer. I tried many times, and in the end I was successful. From these setbacks(挫折), I have learned a lot. Now I be­lieve that if the HP computer hadn't had any problems,14I would not have learned how to build the new one. Even though I spent lots of time on it, I know it wasn't15.1.A.daysB.weeksC.monthsD.years2.A.AtB.OnC.ToD.For3.A.bigB.newC.cheapD.small4.A.wonB.paidC.agreedD.received5.A.At firstB.At lastC.At onceD.At times6.A.ifB.thatC.whatD.how7.A.tryB.triedC.to tryD.trying8.A.doB.didC.don'tD.didn't9.A.hopedB.haveC.hadD.liked10.A.howB.whatC.whyD.where11.A.freeB.sadC.busyD.exciting12.A.alreadyB.alwaysC.stillD.usually13.A.themselvesB.himselfC.itselfD.myself14.A.orB.thenC.soD.and15.A.a waste of timeB.a successful jobC.a good computerD.a bad company