题目

用洋葱（2N=16）进行低温诱导植物染色体数目变化实验，有关分析正确的是A.零度以下低温会使实验结果更明显B.在显微镜下可观察到染色体数目加倍的过程C.用卡诺氏液对根尖解离后需用95%酒精冲洗2次D.在高倍镜下可观察到染色体数为16、32、64个细胞 答案：【答案】D【解析】A、低温诱导时也有叫合适的温度，不是温度越低越好，温度太低会直接影响到生命活动的进行，A错误；B、在解离时细胞已经死亡，所以看不到染色体数目加倍的过程，B错误；C、卡诺氏液是固定细胞形态的，不是解离的，C错误；D、因为细胞分裂是不同步的，所以在显微镜下能观察 阅读短文，根据其内容，补全下面表格。（每小题1分，分）Anderson (安徒生), a Danish （丹麦） writer, is famous for his fairy tales（童话）. Both children and adults love his stories. For example, The Ugly Duckling is well-known to people around the world. In fact, Andersen used to be an ugly duckling when he was young.In 1805, Andersen was born into a poor family in Denmark. As a young boy, he was tall and ugly and had a very big nose. His friends always made jokes about his big nose. Later, because of his father's death, little Andersen had to make a living by himself. He once worked as a dressmaker and made money in a theater.The difficulties in life helped him create his fairy tales. In The Little Mermaid, he talked about love and sacrifice(牺牲. In Emperor's（皇帝的） New Clothes, He made fun of the authority(权威).Besides creating stories, Andersen also loved travelling. His famous saying was, "To travel is to live."Today, Andersen's fairy tales have been printed into over 100 languages. The Hans Christian Andersen Award is named after him. It's the highest award to give a writer of children's books.King of Fair Tales and His Fantasy LandsPersonal ExperiencesHe was born into 【1】 _____________________________ in Denmark, in 1805.He was laughed at by his friends because of his looks.He lived a hard life after his father’s death, 【2】 _______________ and making money in a theater.He wrote about his trips while travelling to many countries.Master worksThe Ugly Duckling is based on his own experiences. 【3】 _____________________________ shows love and sacrifice.In Emperor's New Clothes, 【4】 ________________ the authority.AchievementAndersen made great contributions to【5】________________________