题目

A middle-aged woman came _______ to the bus stop only ______ the bus had gone. A . to run, finding B . running, to find C . and ran, found D . running, find 答案：B在如图的甲乙两装置中，甲是一个    滑轮．若滑轮重不计，摩擦不计，物重G1=G2=5牛，则拉力F1=    牛，F2=    牛．弹簧测力计的读数T1    T2（选填“大于”、“等于”或“小于”）．