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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.Back to Shidao Pier一来可以让你好好将养，二来若是敌军有异动，有你守在营寨，本将那是十分放心。When designing the PCB, the traveling direction of the production line should be considered. If the traveling direction of the PCB is X direction and its vertical direction is Y direction, X ≥ Y (referring to size) should be ensured.呀啊——他骂着骂着就仰头尖叫。NBC剧集《罪恶黑名单》宣布续订第8季。 该剧也刚庆祝了总第150集开拍，目前播到第7季，下半季将于3月20日回归，本季和第6季的收视都较为稳定，是续订因素之一。11　二〇三高地