(单选题)11: The other people watched the boy with_______. A: interesting B: interested C: interest D: interests ...
(单选题)5: We must struggle ( ) the bad weather. A: to B: with C: for D: at ...
(单选题)24: Look ( ) the word in the dictionary. A: in B: up C: on D: at ...
(单选题)18: -Is Mary speaking? A: Who are you ? B: Who's that? C: I'm here. D: What's your name? ...
(单选题)12: To her ( ), the man was a thief. A: doubt B: suspicion C: confusion D: guess ...
(单选题)6: Are you ( ) with this type of machine? A: similar B: same C: familiar D: like ...
(单选题)25: 关于摩擦力,正确的说法是() A: 摩擦力总是作负功 B: 摩擦力的方向总是与物体运动的方向相反 C: 静摩擦力总是阻碍物体的相对运动趋势 D: 静摩擦力总是与静摩擦系数有关 ...
(单选题)19: 对功的概念有以下几种说法:(1)保守力作正功时,系统内相应的势能增加(2)质点运动经一闭合路径,保守力对质点作的功为零(3)作用力和反作用力大小相等、方向相反,所以两者所作功的代数和必为零。以上说法中正确的是() A: (1)(2)是正...
(单选题)1: 关于高斯定理的理解有下面几种说法,其中正确的是() A: 如果高斯面上电场强度处处为零,则该面内必无电荷 B: 如果高斯面无电荷,则高斯面上电场强度处处为零 C: 如果高斯面上电场强度处处不为零,则高斯面内必有电荷 D: 如果高斯面内有净电荷,则...
(单选题)20: 下面说法正确的是() A: 等势面上各点的场强大小都相等; B: 在电势高处电势能也一定大; C: 场强大处电势一定高; D: 场强的方向总是从高电势指向低电势。 ...