A:followed
B:following by
C:and following
D:followed by
如图所示,O为直线AB上一点,OD平分∠AOC,∠DOE=90°.
用毛皮摩擦过的橡胶棒去靠近由细线吊着的轻质小球,产生了互相吸引的现象,则该小球〔 〕