单项选择题
Fog is likely to occur when there is little difference between the dew point and the（）.
A.relative humidity B.air temperature C.barometric pressure D.absolute humidity
单项选择题 The company should establish and maintain procedures to control all documents and date which are relevant to（）.
单项选择题 The dew point temperature is（）.
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?（）
