[问答题] 结合企业理论和网络经济理论等，讨论发展中国家如何建立自己的组织学习机制。

试述达尔文的自然选择学说的内容。 码头装船机的主要参数应满足（）。 ["船舶装舱要求","装船效率要求","船型的要求","水位的要求"] 碳酸盐岩型铅锌矿床成矿作用 吊载作业时，为了不使千斤绳受力过大，两根千斤绳之间的夹角应不得大于（） ["160°","120°","90°"] Refer to the exhibit. Which recommended practice is applicable?（） [" If no core layer is deployed, the design will be easier to scale."," If no core layer is deployed, there will be fewer cabling requirements."," If no core layer is deployed, the distribution switches should not be fully meshed."," A dedicated campus core layer is not needed for connecting fewer than five buildings."," A dedicated campus core layer should be deployed for connecting three or more buildings."] 结合企业理论和网络经济理论等，讨论发展中国家如何建立自己的组织学习机制。