用基因组成为Aa的水蜜桃枝条，嫁接到基因组成为aa的桃树上，所结水蜜桃果肉细胞的基因组成为Aa的概率是（　　）

缺词填空，其中13-15是根据上下文语境根据首字母填单词 
1.More information can be____(可获得的) on the Internet.
2.We all think his ____ (行为) is very strange. We must stop him from doing so.
3.This gift is so expensive that I can't ____(接受) it.
4.Thank you very much for giving me so many useful____ (建议)．
5.I have____(答复)to my penfriend’s letter．
6.Mr Wang is busy____ (解释)everything to us．
7.He often____(吵架)with his parents in the past．
8.____ (原谅)others for their mistakes is a good virtue．
9.Lily told me that she____(宁愿)to listen to music to relax herself．
10.Do you know who ____  (发现) America?  
11.The old man is different from others. He doesn't act ____ ( 正常 ).
12.Peter has had his bicycle ____ (修理).
13.Did you know that colours can i ____ our moods?
14.Who has p____ my bedroorn pink? My father.
15.Lin Tao is very clever，but he never shows off．He is m____ ．

的值是（　　　）．

已知∠1=60°，∠2=____，∠3=____，∠4=____．