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[Standard Answer] In the anti-terrorism work, citizens' () should be respected and any practical practices based on geographical, ethnic, religious and other reasons should be prohibited.A variety of schemes, the specific implementation can refer to the above introduction./farewell (farewell)人随着时代共同变化，阮鹗这样的硬柿子也不得不渐渐变软，因为太硬会死。First of all, let's introduce the business: in the purchase process, you can select the color of the mobile phone and enter the purchase quantity. At the same time, there are two display areas in the page, which respectively display the color and quantity that the user has just selected. There is also a button that dynamically displays the next operation. We need to query the inventory corresponding to the mobile phone of this color. If the inventory quantity is less than the purchase quantity this time, the button will be disabled and the copy with insufficient inventory will be displayed. Otherwise, the button will be highlighted and can be clicked and displayed if the shopping cart is displayed.TCP State Depletion Attack