带分数是由哪两部分组成的？[ ]

A．整数、分数    

B．整数、假分数       

C．整数、真分数    

D．小数和真分数

For means of abandonment of a ship，which type of embarkation does not require prior approval by the Coast Guard?（）

A.Movable ladders

B.Fixed ladders

C.Safety booms

D.Elevators