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周菡随着她手指一看，果然岸边一块空地上，两个婆子守着两个炭炉子坐着，上面放着两个大瓦罐子，旁边摆着些篮子篓子，里面装着碗勺等家伙。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:Independent Attack +42　　李阵郁剧中饰演温柔热血预备新郎官徐俊亨一角。Http://www.oracle.com/technnetwork/java/javase/downloads/jdk8-downloads-2133151.html现在田荣开始怀疑，范文轲早早就和刘邦有了勾结，他甚至怀疑此番教唆田市调动大军反扑都是他们商议好的奸计。OVR trains N classifiers by taking samples of one class as positive examples and samples of all other classes as counterexamples at a time. If only one classifier predicts a positive class during the test, the corresponding class mark will be taken as the final classification result. As shown in FIG. 3.4, if multiple classifiers predict as positive classes, the prediction confidence of each classifier is usually considered, and the category mark with the largest confidence is selected as the classification result.