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The above code: We use a parameter FN to pass it in, and if there is an instance of result, we will return it directly. Otherwise, the current getInstance function calls FN, and this pointer points to this FN function. After that, the return is saved in the result. Now we can pass a function in, whether it is to create div or iframe. In short, if this is the case, we can use getInstance to get their instance objects.In autumn, they clean up fallen leaves together.再者，他转向板栗和葫芦道：济宁侯当初留下两颗棋子：一个便是宁王之子秦霖，另一个就是侯爷之孙高凡。10-15% of aquatic plants and hidden objects are planted shallowly at the edge of the pond to create an environment for lobsters to inhabit and shell and reduce mutual killing. The influence of water quality on lobster yield cannot be ignored. During the breeding process, the PH value of the pool water is kept between 7.5 and 8.5, and the transparency is 30-40cm. Fresh water should be added frequently, quicklime solution should be splashed regularly, water quality should be adjusted, and diseases and shelling failure should be prevented. 2. Feed feed reasonably. Lobsters will kill each other when hungry and under-fed, so the feeding amount must be sufficient. Lobster feed is animal and plant feed. Plant feeds are wheat, aquatic plants, rapeseed cakes, etc. Animal feeds are miscellaneous fish, miscellaneous meat, livestock viscera, etc. At ordinary times, the feeding time, feeding amount and feeding method are determined according to the habit of lobsters falling in the day and coming out at night and the density of lobsters in the pond. 3. Scientific fishing. Young shrimps can grow to commercial specifications in 60-90 days under the condition of suitable temperature and sufficient feed. The seedlings will be released in March and will be caught in rotation around June, selling large ones and keeping small ones.《侠探高飞》讲述的是因为一批神秘军火引发的诸多阴谋和各派鏖战，颇有《蒸发密令》军火争夺战的意思，最亲近的朋友、处处刁难的对手，呈现给你的永远不是他的真实面目。特工003高飞不能放过任何蛛丝马迹，才能捋出头绪，寻找敌友，完成最终的任务。高飞这个角色，也是临危受命，为了民族命运才参与到寻找军火这场事关家国情仇的任务中来，“侠盗罗宾汉”的英雄侠义色彩跃然纸上。这部戏除了会上演迷踪追凶、激情对战之外，主人公高飞在执行任务过程中，还会遇到旧情新爱两难选择的情感问题，让铁汉尽展柔情一面。在漫威的Cos大作《异人族》放完后，《神盾局特工》就将接棒回来。漫威在纽约漫展上宣布，《神盾局特工》第五季将于12月1日回归，美国时间当天晚上8点进行特别首映，从12月8日开始恢复晚9点放映时间。