题目

语法填空 Have you ever heard of Tree Shaping? It is the practice of(make) trees and other woody plants form(形成) beautiful or (use) shapes. There is a man in Australia and he(have) the hobby of making plants. He was a jewelry(珠宝) maker he was young. Then he got an orchard(果园) and he began to take care of it by (him). working with trees there, he got idea of making a chair with trees. Then he began to make (difference) furniture. Until now, he has made chairs, coffee table, a garden gate and so on. The man's hobby is unusual, it really has a lot of fun.（文）已知甲，乙两名射击运动员各自独立地射击1次命中10环的概率分别为，（I）求乙在第3次射击时（每次射击相互独立）才首次命中10环的概率（II）若甲乙两名运动员各自独立地射击1次，求两人中恰有一人命中10环的概率