da shu ju shi shen me ? qi shi hen jian dan , da shu ju qi shi jiu shi hai liang zi liao ju liang zi liao , zhe xie ju liang zi liao lai yuan yu shi jie ge di sui shi chan sheng de shu ju , zai da shu ju shi dai , ren he wei xiao de shu ju dou ke neng chan sheng bu ke si yi de jia zhi 。 ?0?