椎动脉型颈椎病的眩晕属于
A.神经官能症性B.耳源性C.外伤性D.眼源性E.脑源性
参考答案:E
解析:椎动脉型颈椎病引起的眩晕是由于椎动脉受压、脑部血液供应缺乏导致的。
标有“PZ220-100”的灯每天正常工作2小时,一个月(按30天计),共消耗电能______kW.h.
What danger is presented if a waterspout passes over a ship?()
A.Heavy rains could cause downflooding
B.Visibility could be restricted by low clouds
C.Large waves could cause structural damage
D.Personnel may be injured by loose deck gear blown by the wind