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"Is-A" refers to the "one" of one class and belongs to another class, while "Has-A" is different, which indicates that a certain role has a certain responsibility. A common reason for the wrong use of inheritance instead of aggregation is to mistakenly treat "Has-A" as "Is-A". For example:范文轲心中暗叹一声，回答道：这都多亏了祖上积蓄……那么范先生接下来如何打算？准备在何处经营，何处发财呢？刘邦本来想问问范家具体的出身和底细的，这些事情萧何派人调查了，竟然没有结果，当真是奇怪。. Z2 W% F) f* z1 w + M $_, V1 on the morning of January 7, President Moon Jae in appeared at Seoul's Longshan CGV Cinema to watch the June democratic struggle movie 1987. Before watching the movie, Moon Jae in held talks with the mother of martyr Li Hanlie, Ms. Pei Yinxin, the elder brother of martyr Park Chung-chul, Mr. Park Chung-chul, as well as the director and main actor of 1987, Yu Xianghu, member of the Common Democratic Party, and the filmmaker.　　随着宝盒的秘密一层层被揭开，所有人都身不由己的被卷入到这一漩涡中。哑狼用生命保One thing can be seen from the previous source analysis: the dispatchTouchEvent () method is called by the parent View, and the child View tells the parent View whether the event has been consumed through the return value of this method (see source analysis number 7 for details, and the extension at the end of case 1).This.name = name;