问题
填空题
在Java语言中提供了标准类库，为编程所需的低层模块提供了常用的方法和接口，并将它们分装成包，每个包又包括子包，形成【 】结构的类层次。
答案
参考答案：树
解析：知道Java语言中的类和继承的概念，树结构也就不难理解。注意：树结构中根结点是Object。
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在Java语言中提供了标准类库，为编程所需的低层模块提供了常用的方法和接口，并将它们分装成包，每个包又包括子包，形成【 】结构的类层次。
参考答案：树
解析：知道Java语言中的类和继承的概念，树结构也就不难理解。注意：树结构中根结点是Object。
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| It is good that young men should begin at the beginning and occupy the least important positions. 1 of the leading businessmen of Pittsburgh had a serious responsibility placed upon them at the very beginning of their 2 . They were 3 to the broom, spending the first hours of their business livs 4 the office. And here is the basic 5 of success, the great secret: 6 your energy, thought, and capital (资本) wholly on the business in which you are 7 . Having begun in one line, determine to fight it out on that 8 , to lead in it, adopt every 9 , have the best machinery, and know the most about it. The companies which fail are those which have 10 their capital, which means that they have scattered their brains, 11 . They have investments in this, or that, 12 the other, here, there, and everywhere. "Don't put all your eggs in one basket" 13 all wrong, I tell you. "Put all your eggs in one basket, and then 14 that basket". Look round you and take 15 ; men who do that do not often fail. It is easy to watch and carry the one basket. It is trying to carry 16 many baskets that breaks most eggs in this country. He 17 carries three baskets must put one on his head, which is 18 to fall down. One 19 of the American businessman is lack of concentration. Remember: put all your eggs in one basket, and watch that basket. As Emerson 20 , "no one can cheat you out of final success but yourselves." | ||||
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