单项选择题
The heaviest type pallet is the（）.
A.factory pallet B.shipping pallet C.stevedoring pallet D.warehouse pallet
单项选择题 The head of the bend is the（）.
单项选择题 The firing of a red star signal may mean（）.
单项选择题 The Coordinator Surface Search in a SAR situation should display by day（）.
