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To put it bluntly, it is convenient to make changes.IV. Application Value of BIM Technology in Operation and Maintenance"Yes, it's the kind of big rats. They are more difficult to deal with than big wasps. Especially when these two things go together, one is in the sky and the other is underground. We should be too busy to take care of them. Moreover, the kind of big rats have very strong teeth. It's a piece of cake to bite off their arms and legs in three or two, and they move very quickly." Zhang Xiaobo said.Under the "Learning Book" section, In addition to the relevant books concerning General Secretary Xi Jinping, they also include the Complete Works of Marx and Engels (82), the Collected Works of Marx and Engels (11), the Selected Works of Marx and Engels (4), the Complete Works of Lenin (60), the Selected Works of Lenin (4), the Selected Works of Lenin (5), the Selected Works of Mao Zedong (4), the Collected Works of Mao Zedong (8), the Selected Works of Deng Xiaoping (3), the Selected Works of Jiang Zemin (3) and the Selected Works of Hu Jintao (3). These books are all PDF versions, although catalogue reference and text retrieval are not yet available, which has provided great convenience for ordinary learners.高级住宅小区的保姆大苗和保安国梁引起了轩然大波，他们在中年保安大丁的新婚之日，帮助小保姆二梅逃婚，新娘从此下落不明。大丁赔了夫人又折钱，狂怒不已，逼大苗交出二梅，遭拒后发誓不让大苗和国梁有一天安稳的日子，他表面粗悍，却功于心计，招招恶毒狠辣。先是诬陷大苗伙同二梅诈骗他钱物，后又设计偷走居民名贵小狗栽赃大苗，说是被大苗和国梁盗买，所造“罪证”真得令人深信不疑，警方加入，一直被誉为小区模范保姆的大苗名誉扫地，陷入困境。但大苗认实理，为保护保姆姐妹敢做敢当，勇于面对，与大丁周旋。忠厚善良的国梁却不一样了，像是欠了大丁还不清的债，逆来顺受，笑脸相对。大苗深爱国梁，多次表示爱意，国梁也爱她，可是不敢接受，倒不是她有个不知跟谁生的九岁的女儿念念，而是他自己有难言之隐，国梁在八岁时在前往少年宫学校小号的路上遭遇过严重车祸，父母双亡，他脑部受伤留下后遗症，常常发病，随时会瘫痪和死亡，他不想拖累大苗。但面对深情款款而又漂亮直率的大苗，优柔寡断的性格又使他这想法不很坚决，他年轻，渴望爱情，因此态度左右摇摆，Find the learning community: Because a large amount of knowledge exists in the practice of the learning community, not in books, effective learning is not to close the door and practice hard, but to find your own learning group. For example, programmers practice programming on websites like GitHub.Http://www.jiemian.com/article/2067099.html