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"Drill the ground?! You mean go underground and avoid attack?" I was very surprised to hear this, so I asked back.In web development, Picture preloading is a common technique, If you set the src attribute directly to the img tag node, If the picture is larger, Or if the network speed is relatively slow, Before the picture is loaded, The picture will be a blank scene for a period of time. This is not good for the user experience, so at this time we can use a loading loading picture as a placeholder to prompt the user that the picture is being loaded before the picture is loaded. After the picture is loaded, we can directly assign a value to the picture. The following code is as follows when we do not use proxy mode to preload pictures:该剧讲述了警察学校里两个万众瞩目的焦点，一个古灵精怪，一个破案天才在学校和警局里发生的一系列搞笑又神奇的故事。With the development of CSRF vulnerability research, there are some special tools for CSRF vulnerability detection, such as CSRFTester and CSRF Request Builder.杨宜固然吸取了几位前辈的教训，但由总督开始无作为的腐化，士气低落，不求有功，但求无过，全军风气风骨荡然无存。　　李延年（王雷 饰）：讲述其在抗美援朝战场上的英雄故事。　　讲生意-