施主能级和导带底之间的能量差,称为()。
参考答案:施主电离能
颌乳中切牙易患龋牙面是()
A.唇面近中面
B.近中面远中面
C.近中面面
D.唇面远中面
E.远中面面
()means navigational and meteorological warnings, meteorological forecasts and other urgent related messages broadcast to ships.
A.Navigational broadcast
B.weather forecast
C.Urgency message
D.Maritime Safety Information