单项选择题
A.bring the sails parallel to the wind B.reduce sail area exposed to the wind C.allow the sails to catch more wind D.remove all tension on the main and jib sheets
When a tornado moves over the water from land it is cal...
单项选择题When a tornado moves over the water from land it is called a（）.
A.Tornado B.Waterspout C.Hurricane D.Cyclone
Wen a hurricane passes over colder water or land and lo...
单项选择题Wen a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）（）.
A.High pressure area B.Extratropical low-pressure system C.Tropical storm D.Easterly wave
When a hurricane passes into high latitudes over colder...
单项选择题When a hurricane passes into high latitudes over colder water and the source of heat is disrupted，the storm assumes the characteristics of（）.
A.a high pressure area B.an extratropical cyclone C.a tropical storm D.an easterly wave
