帮我讲解这道题目---**Question 7** **Question Stem:** 7. 一个装满水后瓶盖密封的硬塑料瓶, 放在水平地面上, 如图1, 水对瓶底的压强为 P₁, 瓶底对桌面的压强为 P₁' ; 将瓶倒置后, 如图2, 水对瓶盖的压强为 P₂, 瓶盖对桌面的压强为 P₂' , 则 ( ) **Translation of Question Stem:** 7. A rigid plastic bottle sealed with a cap after being filled with water is placed on a horizontal surface. As shown in Figure 1, the pressure exerted by the water on the bottom of the bottle is P₁, and the pressure exerted by the bottom of the bottle on the table is P₁' ; After inverting the bottle, as shown in Figure 2, the pressure exerted by the water on the cap is P₂, and the pressure exerted by the cap on the table is P₂' , then ( ) **Options:** A. P₁ > P₂ P₁' > P₂' B. P₁ = P₂ P₁' < P₂' C. P₁ < P₂ P₁' < P₂' D. P₁ = P₂ P₁' = P₂' **Chart/Diagram Description:** * **Type:** Two images, labeled Figure 1 and Figure 2. Each image shows a bottle. * **Figure 1:** Shows a bottle standing upright on a horizontal surface. The bottle is cylindrical for the most part, with a narrower neck and a cap on top, resting on its wider base. It is labeled "图1" (Figure 1). * **Figure 2:** Shows the same bottle inverted on the horizontal surface. The bottle is resting on its cap, and the wider part is above. It is labeled "图2" (Figure 2). * **Content:** The figures illustrate the two states described in the problem stem: upright and inverted.