单项选择题
A.always higher than the air temperature
B.always lower than the air temperature
C.equal to the difference between the wet and dry bulb temperatures
D.the temperature at which the air is saturated with water vapor
单项选择题 Where would you find information about the time of high tide at a specific location on a particular day of the year?（）
单项选择题 Before any loading takes place any signs of the previous cargo should do（）.
单项选择题 Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）