题目内容
某一植物雌雄异株，把阔叶雌株与阔叶雄株杂交，后代的雌株均为阔叶，雄株中阔叶与窄叶呈1:1分离，请分析该现象
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简述环境对性别分化的影响？
减数分裂过程包括两次细胞分裂，染色体的减数发生在第一次细胞分裂的时候。我们已经知道基因在染色体上，既然
C
Movies are the most popular form. of entertainment(娱乐) for millions of Americans. They go to the movies to escape their normal everyday existence and to experience a life more exciting than eir own. They may choose to see a particular film because they like the actors or because they
have heard the film has a good story. But the main reason why people go to the movies is to escape. Sitting in a dark theater, watching the images on the screen, they enter another world that is real to them. They become involved in the lives of the characters in the movie, and for two hours, they forget all about their own problems. They are in a dream world where things often appear to be more romantic and beautiful than in real life.
The biggest "dream factories" are in Hollywood, the capital of the film industry. Each year, Hollywood studios make hundreds of movies that are shown all over the world. American movies are popular because they tell stories and they are well-made. They provide the public with heroeswho do things the average person would like to do but often can ' t. People have to cope with many problems and much trouble in real life, so they feel encouraged when they see the "good guys" win in the movies.
65. The Americans go to the movies mainly because they want
[ A] to enjoy a good story
[ B ] to experience an exciting life
[ C] to see the actors and actresses
[ D] to escape their daily life
淡水淹溺的病理改变是
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