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一、单选题1.以下说法中错误的是(A)因为液体表面存在张力,所以使表面层分子的分布比液体内部稀疏;(B)多晶体在整体上表现为各向同性;(C)固体分子间的引力和斥力是同时存在的;(D)液体中的布朗运动是小颗粒受液体分子碰撞而产生的运动.答.[ ]2.取一段带棉线圈的棉线系在硬金属环上,将此装置浸入肥皇液后取出,硬金属环上有一如下左图所示的肥皂膜,若将肥皂膜的1和2两部分刺破后,残缺的肥皂膜的形状可能是下右图中的哪一个?答:[ ]
First, the single choice questions 1. The following statements are wrong (A) due to the existence of liquid surface tension, so that the distribution of surface layer molecules than the liquid interior sparse; (B) the overall performance of polycrystalline isotropic; (C ) Gravity and repulsion between solid molecules exist at the same time; (D) Brownian motion in liquids is the movement of small particles that are collided by liquid molecules. A. [2] Take a piece of cotton thread with a cotton loop attached to the hard metal. On the ring, the device is immersed in the Feihuang liquid and taken out. The hard metal ring has a soap film as shown in the left figure below. If the soap film 1 and 2 are punctured, the shape of the incomplete soap film may be down. Which one on the right? A:[ ]