A check line is（）.

A.a safety line attached to a man working over the side

B.used to measure water depth

C.used to slow the headway of a barge

D.used to measure the overhead height of a bridge

颐和园东北角的“谐趣园”景区以水池为中心布局，周围环布轩榭亭廊，形成富于江南园林意趣的园中之园，造园的手法是仿（）。

A.寄畅园

B.网师园

C.拙政园