题目

After working one day,I decided to take hold of a sandwich for dinner at the superstore.As I was_41_home,I saw a girl sitting against a pillar（支柱）in the_42_,her hair covered over her face and her body was_43_than a senior citizen. I decided to walk past her_44_that's what we do in society—we walk past people we don't know, especially _45_people.But something made me go back.I_46_that her parents died years ago and she suffers from Lupus（狼疮）.She has no job,unable to work because of her47.She had lived in shelters in the past,but was abused.She_48_in the superstore to ke在“探究求合力的方法”的实验过程中（1）用两个弹簧测力计分别钩住细绳套，互成角度地拉橡皮条，使它伸长到某一位置O点．在这一步操作中必须记录的是ACACA．两个弹簧测力计的读数B．橡皮条伸长后的总长度C．描下O点位置和两条细绳套的方向D．橡皮条固定端的位置（2）做实验时，根据测量结果在白纸上画出如图所示的图，其中O为橡皮条与细绳的结点，图中的FF是F1和F2的合力的理论值；F′F′是F1和F2的合力的实际测量值．