题目

________，his bookishness，curiously little is known about the world view of Gordon Brown，the first British Prime Minister said to be a real intellectual in decades. A．Though                      B．As C．In spite that               D．Despite 答案：D用如图所示滑轮组提起重G=320N的物体，整个装置静止时，作用在绳自由端的拉力F=200N，则动滑轮自身重力是（绳重及摩擦不计）A.120NB.80NC.60ND.无法计算