大侧肌
参考答案：
鱼类体侧一系列按节排列呈锯齿状的肌节，肌节间有结缔组织的肌隔相隔。
He fell off the bike ________.
A．while he rode
B．while he was riding
C．while he is riding
D．while on bike
同一室内的插座安装高度应一致。同一室内的三相插座，接线的相序应相反，便于电动机正反转。
