题目

It was ________ of my secretary not to have let others disturb me this morning when I was occupied with my work. [ ]A. generous B. polite C. considerate D. sympathetic 答案:答案:C一个圆柱体的底面积是72平方厘米,高是6厘米,体积是________立方厘米,与它等底等高的圆锥的体积是________立方厘米.
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