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试题第Ⅰ卷二、选择题:本题共8小题,每小题6分,共48分。在每小题给出的四个选项中,有的只有一项符合题目要求,有的有多项符合题目要求。全部选对的得6分,选对但不全的得3分,有选错的得0分。14.下列关于布朗运动的说法,正确的是(A)布朗运动是液体分子的无规则运动(B)液体温度越高,悬浮粒子越小,布朗运动越剧烈(C)布朗运动是由于液体各部分的温度不同而引起的(D)布朗运动是由液体分子从各个方向对悬浮粒子撞
The first volume of test questions Second, the multiple-choice questions: a total of eight questions of the title, each small question 6 points, a total of 48 points. Among the four options given in each question, only one of them meets the requirements of the title, and some of them meet the requirements of the title. All selected on the 6 points, but not on the election of the 3 points, the wrong choice of 0 points. 14. The following statements about Brownian motion correctly (A) Brownian motion is a random movement of liquid molecules (B) The higher the liquid temperature, the smaller the suspended particles, the more intense Brownian motion (C) Brownian motion is due to the liquid Part of the temperature caused by different (D) Brownian motion is caused by the liquid molecules from all directions on the impact of suspended particles