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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.黄斌见这状况，只好放弃劝说了。The landlord continued to update during lunch time.中军大帐里，西楚霸王项羽说道：撤军吧，没必要再继续待下去了。14岁的毒贩约翰尼住在一个青少年之家。当他得知他不能在周末回家时，他请他的一个顾客，著名的成功演员安东尼，做他的周末监护人。张良笑道：此事不可操之过急，我们可以对尹旭加以暗示，然后再进一步的沟通，还是很有可能的。　　其他演员包括Maria Gabriela de Faria﹑Josh Segarra﹑Kevin Bigley﹑Gerry Dee﹑Ulka Simone Mohanty及Megan Park。