题目

用马铃薯茎尖细胞进行组织培养获得幼苗，该过程不涉及细胞的（    ） A．生长          B．减数分裂         C．有丝分裂        D．全能性 答案：BToday, almost everyone has heard of Harry Potter. The books detailing his experiences at Hogwarts School of Witchcraft and Wizardry have aroused passion, creativity, and interest in reading throughout the world. But have you ever considered why you are a fan of the Harry Potter series? JK Rowling has created a list of characters and an environment for them to inhabit that appeals to both adults and children.  The fantasy aspect of the wizarding world expands the imagination, and takes the mind to new and exciting places. Anything could happen there. Her stories contain parts of the believable and unbelievable, changing the predictability that readers commonly come across and bear in fiction.  The main theme of the series, including good versus evil, prejudice, love, death, sacrifice, friendship and loyalty, in actuality contributes to the ever-lasting nature of the stories. At the same time, these themes remind us of classic literature, offering mature readers tales that wear like a comfortable pair of shoes, while introducing younger readers to concepts they will meet throughout their lives.  Much of the appeal also comes from the characters. In each book, JK Rowling introduces and describes the characters in such a way that we wonder not only about their futures, but also about their pasts. Even supporting characters are suddenly more than just extras in the background. And what of Harry Potter himself? We care about Harry, because we watch him grow from an innocent boy to a powerful wizard. We see him as both Hero and Victim. He experiences endless love and extreme pain, and as readers, we experience them with him. This perfect combination of emotion, suspense and fantasy, together with the fact that JK Rowling is a superb storyteller is the reason why we are Harry potter fans. People are fond of Harry Potter series. With books like these, it’s hard not to be. Harry Potter series become popular partly because ____________. A. they remind us of the childhood and environment we had in the past B. they take us to a world beyond our imagination and expectation C. they offer us ever-lasting nature of the stories D. they set an example of hero for us to follow What does the underlined sentence in Paragraph 6 mean? A. The supporting characters are not necessary in the story. B. Readers care only about Harry but not those supporting characters. C. Even the supporting characters are attractive in the story. D. Those supporting characters only appear all of a sudden. The themes of the Harry Potter series do not contain ____________. A. prejudice and love                          B. good and evil C. death and sacrifice                          D. safety and peace People care for Harry Potter because ____________. A. they think of classic literature when reading the story B. they find different experiences from theirs on Harry C. they share the experiences with Harry D. they like JK Rowling’s description very much