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Private Collection collection;钟隐叹道：这倒是，当年的事情横亘在他们祖孙俩之间也不是个事，总得想个办法解开才是。听你这么一说，我觉得心里踏实多了。I follow the execution process of this small program: first, take exp and "\ +" as parameters, call the calculation (String, String) method in the AbstractCalculator class, call split () of the same kind in the calculation (String, String), then call the calculation (int, int) method, enter the subclass from this method, after executing return num1 + num2, return the value to the AbstractCalculator class, assign it to the result, and print it out. It just verified our initial thinking.7. Ships at anchor should strike the bell for about 5 seconds at intervals not exceeding 1 minute at a time. For ships of 100m or more in length, the horn bell shall be struck at the front of the ship, and the horn gong shall be struck at the rear of the ship for about 5 seconds immediately after the bell. In addition, ships at anchor can also sound three times in a row, i.e. One short, one long and one short, to warn approaching ships to pay attention to the position of the ship and the possibility of collision.她们都是为了医学院筹银。若然人生是个舞台，台上总有被镁光灯照耀的主角，亦有光影外的配角。不过，台上充满陷阱，无论是主角或配角，也有机会中伏，随时跌得一蹶不振。只要不放弃，主角或配角都有一个华丽转身的机会，重新振作，演活一台人生好戏。