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, P8 g7 I 'Z! O5. Os.rmdir ()--Delete the specified directory　　周传冰的儿子周易在美国闻讯后，决然归国，知晓事情的真相后，立誓为父报仇，周易卧薪尝胆，压抑了自己的个性，千方百计进入杨家，开始实施自己的复仇计划。 杨振鹏自以为是，独断专行、飞扬跋扈的气势到了一个空前的程度，对待他一同创业共同辉煌的好友刘志远的诚恳意见，不但听不进去，甚至到了排斥对方的程度。对当面一套，背后一套的大军反而倍受重用。　　危急关头，被常年在白鸭湖以打渔为生的小兴与爷爷发现，救出了高传宝等人，小兴的爷爷却献出了生命。不甘心失败的山田再次纠集队伍欲杀回马枪，却被狡猾的汤丙会制止，说过不了多久芦苇一黄，一把火就可以烧到头，让土八路死无藏身之处。D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:Third, the application value of BIM technology in design你……你……老夫纵横沙场二十多年，你一个乳臭未干的小儿……葫芦轻蔑地打断他的话：不是纵横沙场，是纵横官场。