单项选择题
A storm’s track is characterized by all of the following except（）.
A.the direction the storm has come from B.the direction in which the storm is moving C.the speed at which the storm is moving D.the path taken by the storm
单项选择题 A stand-on vessel is（）.
单项选择题 A stage should only be rigged（）.
单项选择题 A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
