题目

关于低温诱导洋葱染色体数目变化的实验，下列描述错误的是      A．处于分裂间期的细胞最多     B．在显微镜下可以观察到含有四个染色体组的细胞     C．在高倍显微镜下可以观察到细胞从二倍体变为四倍体的过程     D．低温诱导染色体数目变化与秋水仙素诱导的原理相似   答案：CThe day that I met my best friend for the first time, I was full of anxiety. I was trying to do some ______ for an important oral exam in the local library, but people kept ______ me. I was getting annoyed and of course, I wasn’t able to ______. Suddenly I heard someone singing behind me. I ______ and glared at the person who was singing. It was a tall girl about the same age as me.She looked like a sensitive, friendly girl didn’t matter. If anything, it made me even angrier.” How could she be so selfish?” I thought ______. I picked up my books, glared at her and whispered coldly, “Thanks to your ______, I’ve been unable to study. You’re so ______!” I left the library in such a hurry, I left the most important textbook ______. when I got home two hours later, I found that textbook gone. I was so ______ that I almost cried. Just then, the phone rang. a gentle voice ______ the speaker as Jenny and asked if I was Jane. After ______ that I was, she said that she had noticed I’d left my book in the library and as my ______ was in it, she’d asked a librarian to get my phone number f. She said that she didn’t live far away and could bring it around for me if I needed it. I sighed with ______and agreed to meet her at the convenience store down the road. Of course you’ve ______ who Jenny was. She was the girl I had shouted at for singing in the library. When I recognized her in the convenience store, I was filled with ______ and apologized for my ruled behavior I felt so ______, but Jenny just laughed, saying she was glad to see that I’d also left my ______ in the library! I couldn’t help laughing at this and I invited her back to my apartment for a quick cup of tea. Ever since then we’ve been best friends and we got along really well. To be honest, I trust her more than any one else. I often think how ______ I am. If Jenny hadn’t been a kind person who was willing to ______ my shortcomings, I would ______ have experienced such true friendship. 小题1:A．researchB．revisionC．workD．experiment小题2:A．watchingB．askingC．warningD．disturbing小题3:A．speakB．improveC．concentrateD．follow小题4:A．turned aroundB．turned downC．turned offD．turned over小题5:A．sadlyB．hopelesslyC．angrilyD．crazily小题6:A．practiceB．noiseC．attitudeD．existence小题7:A．selfishB．activeC．sensitiveD．stupid小题8:A．outB．aroundC．asideD．behind小题9:A．nervousB．carelessC．upsetD．forgetful小题10:A．introducedB．consideredC．tookD．remembered小题11:A．decidingB．conformingC．realizingD．thinking小题12:A．addressB．classC．writingD．name小题13:A．comfortB．reliefC．confidenceD．satisfaction小题14:A．recognizedB．foundC．guessedD．heard小题15:A．courageB．energyC．doubtD．shame小题16:A．worriedB．sorryC．terribleD．excited小题17:A．glareB．expressionC．virtueD．friendship小题18:A．considerateB．pleasedC．luckD．grateful小题19:A．overcomeB．shareC．hideD．forgive小题20:A．everB．neverC．seldomD．Fstill