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D) Practicality and skepticism. When looking at shallow reference books or looking up materials on the Internet, you should type (copy or copy) the code and run it yourself. You should modify other people's source code more and put forward your own opinions: why is the book not designed like this and why is it designed like that? What if you add some methods, method parameters, or member variables? You must do it yourself, at least run it. In addition, we should dare to ask questions and make bricks to bloggers. You can even question the commentary and intention of some chapters of GoF, not to mention some bloggers.The above is compiled from the post-war oral memories of Kang Yuanlian, the company commander of the 2nd Company who took part in the 142 battle earlier, and Liu Guangyuan, Wang Zeduan and Zhao Mingkai, the soldiers who were responsible for guarding the 142 position and took part in the whole process of fighting the two "living biological weapons" of the Vietnamese army.越王尹旭从来不曾怕事，势必要以一个强势的姿态去迎接逐鹿天下的挑战。十年前的一个雪夜优姬迷路遭遇恶鬼，幸得贵族吸血鬼玖兰枢所救。十年后，两人在黑主学院再次相遇。对于救过自己性命的枢，优姬心中存着感激与仰慕，枢虽对优姬有好感，但却因种族间的鸿沟刻意远离。而零虽对优姬也有感觉，但坚硬的内心却阻止了他的感情。等待着他们的命运到底是什么......所以说，这个时代，要么有权，要么什么都没有。江湖中有眼睛的人，也绝无一人不想瞧瞧江枫的绝世风采和燕南天的绝代神功。