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No cards can be inserted, they are all built-in.…,他身边坐着一个女子，容貌算不上特别出众，也勉强算的上是个美人。原来，昨日玄武将军选婿，选中的新女婿却先行离开了，玄武将军又是那副情形，尽管玄武公竭力掩饰，邱公公跟了太后一辈子，如何看不出不妥？他回宫后一五一十跟太后和皇上述说了选婿的情形，以及最后诸人的诡异表现。即便是侥幸逃过了，也不打紧，我们亲自动手便是了。He will never realize what a child means to a mother.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:7-4 attack, 5-6 end up together for the same reason as above.