问题
多项选择题
实生选种时，影响选择效果的因素主要有（）
A.选择压力
B.选择群体的大小及性状变异幅度
C.性状遗传力
D.环境条件的一致性
E.选择方法
答案
参考答案：A, B, C, D, E
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实生选种时，影响选择效果的因素主要有（）
A.选择压力
B.选择群体的大小及性状变异幅度
C.性状遗传力
D.环境条件的一致性
E.选择方法
参考答案：A, B, C, D, E
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| I think I've always been interested in food. My grandparents lived on a farm in Lincolnshire and had a _ 1 . She made fantastic English food; her roast beef was out of this world. I used to love going down to the 2 and watching her work, and I learned a lot from her. I realized that I wanted to be a cook when I was about 12. When other boys 3 to do sports after school, I helped with cooking at home. By the time I was 15, I had 4 _ to be a cook. However, I knew my parents wouldn't allow me to be a cook. I had to tell them about it 5 . I told them that I wanted to do a cookery course for fun, and I stayed for a month in a hotel in Torguay. I enjoyed it so much that I couldn't put off telling my parents any longer, 6 I brought the subject up one night over dinner. 7 there was silence, and then my father asked me why. I explained that cooking was 8 painting a picture or writing a book. Every meal was a work of creation. I could see that my father disagreed, but he was not 9 . He just looked at me and smiled. My mother kissed me. And now I have my own restaurant, and it goes well. I can see they are _ 10 me. However, my grandfather thinks I'm mad to give up farming. | ||||
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