单项选择题
The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the（）.
A.precipitation point B.vapor point C.dew point D.absolute humidity
单项选择题 Foul ground（）2 cables fromits E side.
单项选择题 Top and inner graduated borderlines of the chart are（）.
单项选择题 You are on watch at night in clear visibility and the vessel has just been anchored.The first thing that you should do after the anchor has been let go is to（）.
