进行桩点交接时，下列哪些单位必须参加（）。
A、建设单位
B、监理单位
C、施工单位
D、劳务单位E市政单位
参考答案：A, B, C
Her family _____ much larger than mine four years ago. Her family _____ dancing and singing when I came in last night.
A．were; was
B．was; were
C．was; was
D．were; were
随机扩增多态性（RAPD）是共显性分子标记，可区分纯合子和杂合子。
