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"Well, it's like a knife, but there is no" back of the knife ". Both sides are" blades "and the head is especially sharp." Zhao Mingkai said.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:BT in BT investment mode is the abbreviation of build-transfer, which is a kind of rich investment mode created or simplified by Yan Jiehe, a dark horse tycoon on the 2005 Rich List. Compared with BOO (construction-operation-operation) and BOOT (construction-ownership-operation-transfer), BT investment mode has less operation link for the construction party. Its essence is the transformation of BOT (build-operation-transfer) mode, which means that the project management company advances funds to carry out the construction after the general contract, and then transfers the construction to the government department after the construction acceptance is completed. That is to say, advance funds to build infrastructure projects that the Government cannot start for the time being, and then let the Government repay in installments, thus making huge profits.保安公司老板单子飞妻子早亡，终于抚养女儿单单单长大。单单单刚从北京环境学院毕业，本着曝光污染问题的目的，入职到化工公司老板迟岱岳投资的大酒店。老板迟岱岳因病将生意交给儿子迟雨。一心证明自己的迟雨却总被当做父亲的影子。单单单在此结识安多，两人冲破家人阻力和竞争者的破坏艰难相爱，安多却因要抚养亡兄遗孤神秘失踪。传媒公司总裁路斯琪是迟雨女友，两人因不同价值观渐渐疏远。迟雨爱上单单单，单单单却因利用了他的信任而内疚。单单单面临情感事业的双重打击之际，单子飞放弃东山再起的可能，凑钱助她圆环保梦，累到一病不起。单单单在照料单子飞的过程中得到了真正的成长，与安多也解除误解，重新走到了一起。单子飞也和相扶多年的祝美云开始了新生活。-Akiha (Founder of Akiha PPT and Founder of Knowledge IP Training Camp)PS: The above articles are published or reprinted by Xingtian Network. Xingtian DDOS: Create the greenest and most stable DDOS attacker! Official website: