下列哪些部分是反射弧中含有的成分（） ["感受器","效应器","突触","传入神经"]
Which two mechanisms can be used to detect IPsec GRE tunnel failures？（） ["Dead Peer Detection （DPD）","CDP","isakmp keepalives","GRE keepalive mechanism","The hello mechanism of the routing protocol across the IPsec tunnel"]
银行进行市场环境分析的目的在于（）。 ["把握宏观经济与政策走势","掌握微观经营环境","实现市场定位","进行市场细分","分析客户行为"]
圆柱螺旋弹簧能够承受（）。 ["剪力","压力","拉力","扭力"]
第一次在史上提出比较全面和系统的美育理论的是（）。 ["克罗齐《美学纲要》","席勒《美育书简》","克罗齐《美学原理》","黑格尔《美学》"]
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