单项选择题
Which emergency equipment should you keep near the towing bitts（）.
A.A self-contained breathing apparatus B.A boat hook and a spanner wrench C.A fire ax and/or cutting torch D.A Stokes litter basket
单项选择题 Which action（s）should the operator of a pedestal crane take if crane control is lost （）.
单项选择题 Which action（s）is/are included in crane operations（）.
单项选择题 What is a“Special Warning”（）.
