且夫天地之间，物各有主，____，虽一毫而莫取。（《赤壁赋》）
Women are so accustomed to decades of __________ and to __________ histories of women whose contributions went unnoticed that they assume these conditions still exist today.
以下共点力F1、F2、F3的合力可能为零的是（ ）
