What is TRUE about hoisting operations?（）

A.Personnel may work beneath suspended loads，as long as they are alert and wear hard hats

B.If a suspended load with no tag begins to spin，personnel should attempt to stop the spinning if the load is within reach

C.If tag lines are used to control a suspended load，they should be secured to the deck

D.Personnel not involved in the hoisting operation should be kept clear of the transfer area

诊断前置胎艋较安全可靠的方法是

A． * * 检查
B．肛门检查
C．放射线检查
D．B型超声检查
E．三合诊检查