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嗯？男人这才惊醒，望向周围，不早叫醒我？叫了，大人未醒。虽然没有正面交过手，但是项羽对这位年轻的汉军元帅还是有些忌惮的。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:编剧尼尔·比斯瓦斯（Brad ford RIOTS）适应玛蒂娜的小说，跨越10年的英国社会政治变化。戴卓尔夫人的时代背景及其过渡到新生的劳动力，特别是有关该剧的主题理想化的新的开始；产生和导致幻灭感。　改编自作者婉之的同名小说，由芒果TV出品，讲述了统计学专业的佛系女学生和带有强迫症的高智商教授之间的爱情故事。话罢，他使劲抠了抠，擦拭几下，把堵住孔的灰锈擦掉，原来针眼儿那么大的孔，变成了比小指细一些的大孔。