投资管理与研究协会是（）。

A．record

B．database

C．table

D．field

LOGO is most commonly used by ______.

A．teachers

B．computer programmers

C．adults

D．children

The item most commonly used for signaling was the ______.

A．hat

B．bandanna

C．arm

D．rope

_____ the engines, the diesel engine is ____ used engine on board

A.Between / more commonly

B.Among / the most commonly

C.Between / not more commonly

D.Among / not the most commonly

The following are the most commonly used ratio measures of bank return except______.

A．ROA

B．ROE

C．RAROC

D．NIM

The star formation is most commonly used and requires_____ on the alternator.

A.one slip-ring

B.two sliprings

C.three sliprings

D.four sliprings

Which type of ballast is most commonly used in barges and ships ()_.

A.Water

B.Oil

C.Concrete and barite

D.Sand，rock and gravel