题目

 In those days, political leaders were not  ________ . A. think highly of            B. thought highly C thought highly of           D. thinking highly of 答案：Ｃ某同学的质量是48 kg，每只鞋底与地面的接触面积为120 cm2，则他双脚站立在地面上时，对地面的压力是       N，对地面的压强是        Pa。（取g =" 10" N/kg）