An instrument useful in predicting fog is the().
When compared to air temperature,which factor is most useful in predicting fog?()
Isobars on a synoptic chart are useful in predicting().
利用英版潮汐表推算潮汐,从第二部分“Part II Time and height difference for predicting the tide at secondary ports”可以查到的资料有:() I主港潮汐资料 II主港名称和编号 III主、附港季节改正 IV潮时差 V潮高差