按照西方国家的发展和环保意识的状况来看, 我国急匆匆的开始取消免费塑料购物袋的政策, 其实完全不是从环抱的角度出发的.因为农贸市场和水果店里的塑料袋还是免费的. 一样可以造成塑料垃圾污染. 其实商场里的塑料购物袋, 是出于通货膨胀的考虑. 一个袋子要两三毛钱, 已经很贵了. 不过除了这里能花两三毛钱, 其他的东西基本上已经是以一圆为最小单位了. 分已经被淘汰了. 角差不多也快被淘汰了.
singleton Scopes the bean definition to a single instance per Spring container (default). prototype Allows a bean to be instantiated any number of times (once per use). request Scopes a bean definition to an HTTP request. Only valid when used with a web capable Spring context (such as with Spring MVC). session Scopes a bean definition to an HTTP session. Only valid when used with a webcapableSpring context (such as with Spring MVC). global-session Scopes a bean definition to a global HTTP session. Only valid when used in a portlet context.
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