题目

 It’s well known that the Diaoyu Islands belong to China, which is ______ an island but the Chinese people’s dignity (尊严)as well.      A. no more than               B. not more than            C. more than               D. less than 答案:C(2012?闵行区二模)一个底部为正方形,底面积为2×10-2米2的薄壁柱形容器放在水平桌面中央,容器高为0.12米,内盛有0.1米深的水,如图(a)所示.另有质量为2.5千克,体积为1×10-3米3的实心正方体A,如图(b)所示.求:(1)图(a)中水对容器底部的压强.(2)图(b)实心正方体A的密度.(3)将实心正方体A放入图(a)的水中后,容器对桌面的压强的变化量.
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