题目

在生物学相关的很多实验中都用到了显微镜，以下关于显微镜的叙述，不正确的是（ ） A . “检测生物组织中的油脂”实验需使用显微镜，且可观察到橙黄色的油脂分布在细胞内和细胞间 B . 在“观察植物细胞有丝分裂”时，用光学显微镜观察间期细胞可以看到核仁和松散状态的染色质 C . 在“观察洋葱表皮细胞质壁分离及质壁分离复原”实验中，无需染色就能看到液泡周围不均匀分布的叶绿体 D . 科学家研究质膜时，在电镜下看到的两条线是脂双   Mr. Lang worked in a factory. As a driver,he was busy but he was paid much. His wife was an able woman and did all the housework. When he came back,she took good care of him and he never did anything at home. So he had enough time when he had a holiday. A few of his friends liked gambling (赌 博) and he learned it soon. He was interested in it and almost forgot everything except gambling. He lost all his money and later he began to sell the television,watches and so on. His wife told him not to do it but he didn9t listen to her. She had to tell the police. He and his friends were punished for it. And he was sent down. After he came out of the lock-up,he hated his wife very much and the woman had to leave him.    It was New Year's Day. Mr. Lang didn't go to work. He felt lonely and wanted to gamble again. He called his friends and they came soon. But they were afraid the police would come. He told his five-year-old son to go to find out if there were policemen outside. They waited for a long time and didn't think the police would come and began to gamble. Suddenly the door opened and in came a few policemen.     "I saw there wasn’t any policeman outside,Daddy," said the boy, " so I went to the crossing and asked some to come."46. Mr. Lang was paid much because.  A.he was a driver           B. he worked in a factory C.he haim lot of work to do    D. he had worked there for a long time47. Mrs. Laftg all the housework because .   A. she c6udn’t find any work   B. she thought her husband was tired   C. her husband spent all time in gambling   D. she wouldn’t stop her husband gambling 48. The woman had to leave Mr. Lang because .   A. he didn't love her any longer   B. he wouldn’t stop gambling   C. he had been put into the lock-up   D. he was dismissed (解雇) by the factory 49. Which of the following is right?   A. The boy hoped his father to be put into the lock-up again.   B. The boy thought his father needed some policemen.   C. The boy hoped his father to stop gambling soon.   D. The boy hoped his mother to come back.