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Is to define a main method calculate in the AbstractCalculator class, calculate () calls spilt (), etc. Plus and Minus inherit the AbstractCalculator class respectively, and implement the call to subclasses through the call to AbstractCalculator, see the following example:香港青年学者泰伦和妹妹青青，跟着青青的少数民族男友他差抵达云南边境的苗族部落。翌日，三人乘坐一辆小汽车，北上考古，穿过深山密林，来到一个小山村，他差和泰伦兄妹拜访族长，道明来意。热心的族长安排女儿安娜充当向导，并派出数名壮汉随行搬运用具。邪恶巫师由于争夺族长不成，心怀不轨，待安娜等人离村之后，当天深夜，他带儿子阿星入山作法，从土中挖出棺木，将死尸复活，到村里杀害族长。爱恋着安娜的阿星，怕她有失，追寻入山，邻近某族内女巫得悉村长被害真相，与巫师展开斗法。巫师不敌，被烈火烧死。但他的鬼魂却附到行尸身上，继续作恶……Prunus domestica plumAs Zhao Mingkai said, This unknown dog-like creature has teeth similar to those of salmon, Driven by bite force, it can cause horrible damage to skin, Coupled with the special "X" petal-shaped mouth structure, With the same bite, This mouth shape can cover a larger area, Or can bite a larger target, Although this structure may be more difficult to exert biting force than the common upper and lower structure of the mouth, But I don't know what the bite force of this monster dog is, But what is certain is that it is definitely not small. Special mouth shape + sawtooth salmon-like cut teeth, This also explains why this strange dog, which has always been small, can bite nearly two-thirds of the muscles (watermelon size) of an adult male thigh. Even if it is a small watermelon, if you are interested, you can buy one and put it on your thigh to gesticulate to see how much the volume has reached the total thigh muscle) and tear it off.Training VS "Genius"//277在不久的将来，由于新当选的环境友好型挪威政府已经停止了北海所有重要的石油和天然气生产，挪威代表欧盟被俄罗斯占领罗大佐与梦中女神谭丽茗好不容易人到中年结成连理，哪料飞来横祸谭丽茗车祸身亡。罗大佐深陷悲痛当中，但更令他吃惊的是谭丽茗还有两个孩子—17岁的问题少女康妮和6岁的调皮男孩康凯，一夜之间他变成了孩子的继父。就在他左右为难的时候，亡妻的前夫康成为了孩子也找上门来，欲和罗大佐争夺子女监护权。罗大佐被命运裹挟着进行了一场“战斗”，为了对得起亡妻谭丽茗，罗大佐毅然决然的当起了“继父”，除了照顾两个孩子，还与康成斗智斗勇，为两个孩子创造更好的生活。罗大佐用他的本真善良去对抗命运的嘲弄，最终他完成了对所有人的救赎，赢得了孩子的心，唤醒了亡妻前夫的良知，帮助他重新成为一个合格的父亲，更令人惊喜的是，罗大佐还收获了一份珍贵的爱情