题目

图1为某同学在观察洋葱鳞片叶表皮细胞临时装片时，显微镜下看到的几个视野，请回答：（1）图1中要使视野①变为视野②，应将装片向 方移动；要使视野③变为视野④，应调节图2中标号 所示结构；要使视野中所看到的洋葱表皮细胞体积最大，应选择图3中镜头： 。（2）在视野②中可以看到，洋葱鳞片叶表皮有部分重叠，是因为制作临时装片过程中 。（3）该同学观察后，画了一幅洋葱表皮细胞结构示意图，试指出图中的错误。错误1： 错误2： 错误完型填空 As a saying goes, every bean has its black. It is impossible to make no mistakes all one’s life. My grandpa Nybakken, a carpenter, is no 　1 . Several decades ago he made a mistake –a（n）perfect mistake, 　2 . On a cold Saturday, Mother’s father was building some wooden cases for the clothes his 3 was sending to an orphanage（孤儿院）in China. On his way home, he 　4 into his shirt pocket to find his glasses, but they were gone. He remembered putting them there that morning, so he drove back to the church. His 　5 proved fruitless. When he 　6 replayed his earlier actions, he realized what happened. The glasses had slipped out of his pocket unnoticed and fallen into one of the cases, which he had nailed shut. His brand new glasses, having 　7 him $20 that very morning, were heading for China! He had to drive home 　8 . Several months later, the director of the orphanage came to give a report on Sunday night at my grandfather’s church, 　9 Grandpa and his family also attended. “But most of all,” he said, “I must thank you for the 　10 you sent last year. You see, the bandits（土匪）had just 　11 through the orphanage, destroying everything ,including my glasses. I was desperate. ” “　 12　 I had the money, there was simply no way of 　 13　 those glasses. 　14 headaches every day. Then your cases arrives. When my staff 　15　 the covers, they found a pair of glasses lying on top. ” Then, still gripped（吸引注意）with the 　16 of it all, he continued, “When I tried 　17 the glasses, it was as though they had been made just for me! I want to thank you for being a part of that!” The peopled listened, 18 for the miraculous glasses. But the director surely must have 　19 their church with another, they thought. There were no glasses on their 　20 of items to be sent overseas. But sitting quietly in the back, with tears streaming down his face, an ordinary carpenter realized the Master Carpenter had used him in an extraordinary way. 1. A. expectation　 B. success　 C. comment　 D. exception 2. A. though　　　　 B. although　　　 C. as　　　　 D. so 3. A. factory　　　 B. church　　　　 C. family　　　　 D. country 4. A. turned　　　　 B. reached　 C. filled　　　　 D. put 5. A. research　　　　 B. look　　　　　 C. search　　　　 D. clothes 6. A. mentally　　　 B. physically　　 C. anxiously　　 D. directly 7. A. charged 　　　 B. spent　　　　 C. paid　　　　　 D. cost 8. A. disappointed　　 B. pleased　 C. nonstop 　 D. quick 9. A. which　　　　 B. what　　　　　 C. where　　　　 D. when 10. A. cases　　　　 B. clothes　　　 C. glasses　 D. wishes 11. A. cut　　　　　 B. swept　　　　 C. pulled　　　　 D. broken 12. A. Unless　　　 B. As long as　　 C. Until　　　　 D. Even though 13. A. replacing　　 B. finding　 C. wearing 　 D. changing 14. A. Except for　 B. Along with　　 C. Rather than　　　 D. As for 15. A. nailed　　　 B. burnt　　　　 C. removed　 D. took 16. A. preparation　　 B. pleasure　　　 C. satisfaction　　 C. wonder 17. A. out　　　　　 B. over　　　　　 C. for　　　 D. on 18. A. pity　　　　 B. happy　　　　 C. curious　 D. eager 19. A. confused　　 B. associated　　 C. combined　　　 D. compared 20. A. cases　　　　 B. order　　　　 C. list　　　　　 D. orphanage