题目

人体内往往存在着针对一种病毒的不同抗体，合理的解释是                 A．病毒基因在细胞内能高效复制    B．病毒表面往往存在多种蛋白质分子   C．病毒基因在细胞内能高效表达 D．病毒表面往往有多个同种蛋白质分子 答案：B 解析: 略                              B      A handsome young man lived with a cow,and was called Cowboy. One day,seven fairies came down to Earth to have fun. They took a bath in a lake. After the bath all of them flew back to Heaven (天宫) except the youngest one,because she couldn’t find her dress. Cowboy helped her find the dress. The fairy was so moved that she decided to stay on Earth and marry Cowboy. After they got married,the husband went out to grow plants and the wife stayed at home to weave doth (织布) every day. People gave his wife the name Weaving Girl. Two years later they had two children. They were living a happy life.      In fact,Weaving Girl was the seventh daughter of the Emperor of Heaven. She could weave colorful clouds to make the wSky more beautiful. When the Emperor found the sky wasn't so beautiful as before,he asked Weaving Girl's grandmother to find his missing daughter and bring her back. Suddenly,a rainstorm broke out that day. Weaving Girl knew that it was her grandmother,who came here to take her back. She told her husband the truth. Then she flew away with her grandmother. Cowboy decided to look for his wife with their children.      When he went to Heaven,the grandmother didn't want Weaving Girl to go back to Earth with her husband. She sent out seven women with their faces covered,and promised to Cowboy ,“If you recognize (认出) which one is your wife,she will go with you. ” Cowboy was stunned (愣住了) when he saw the seven women,because they were all in the same size and shape. But the two children could recognize their mother,because the relationship of mother and child’s blood can’t be cut off. However,the grandmother broke her promise and took Weaving Girl away. When Cowboy was running after them, the grandmother used her magic stick to make a river called Milky Way (银河) between the husband and wife.      Since then,Cowboy and Weaving Girl couldn't get together. Every year,on the seventh day of the seventh month,all magpies (喜鹤) fly to the Milky Way to make the bridge for Cowboy and Weaving Girl to get their family together.根据短文内容，选择正确答案。(   ) 26. Why did Weaving Girl decide to marry Cowboy?    A.Because he helped her find her clothes.    B.Because she couldn't find her way back.    C. Because he didn’t allow her to go away.   D. Because she didn't like the life in Heaven.(   ) 27. What did the Emperor of Heaven want to do about his daughter?    A.He wanted to give her a lesson.    B.He didn't allow her to go back.    C. He wanted to find her back.   D. He wanted her to weave more cloth.(   ) 28. What did Cowboy do after Weaving Girl went away with her grandmother?    A.He sent the children away.    B.He stayed at home.    C. He decided to live alone.   D. He decided to look for his wife.(   ) 29. Who recognized Weaving Girl among the seven women?    A.Cowboy himself.    B.The two children.    C. Somebody else.   D. Nobody at all.(   ) 30. What happened to Cowboy and Weaving Girl in the end?    A.They both came back to Earth    B..They got apart by the mountain.    C.They both lived in Heaven.   D. They could meet once every year.