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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:为了打造千骑系统，天津垓指使亡去给灭亡迅雷站送密钥，与灭的接触以及天津垓对待属下的恶劣态度，让亡动摇不已。千骑诞生后，功不可破的亡却并没有得到好下场……\\"该剧讲述了年轻漂亮的电脑工程师文丽，在暗中搜集调查其仇人张广富的资料，准备为父亲报仇。　　郭道元饰演的是相信科学搜查方法的警察，但是面对诡异的事件毫无头绪。黄正民饰演帮助警察的道士。国村隼饰演事件的导火索，而且是个具有魔性的日本人。国村隼此前曾出演过《花痕》、《极恶非道》、《相棒 剧场版2》等各种类型的影片，演技幅度之广让他对于个性强烈的角色还是温柔的角色都游刃有余。凭借《韩公主》成为影迷心头好的千禹熙的加盟更加令影片受到期待。就跟开了窍似的，对母亲言道：那女孩子才几岁，能懂多少医理，就能开出这样的方子了？不过是听她师傅说的罢了。一个出生在知识分子家庭里被娇惯长大的少女；一个将梦想和未来寄托于丈夫以至于毫不吝啬付出的妻子；一个生活中与婆婆、小姑子摩擦不断但最终仍对她们不离不弃的儿媳；更是一个为了孩子彻头彻尾改变自己一切的母亲　2. Increase damage: