单项选择题
Aphelion is the point where the Sun（）.
A.and Moon and Earth form a right angle B.and Moon and Earth are in line C.crosses the celestial equator D.is farthest from the Earth
单项选择题 Any firefighting equipment that is carried in addition to the minimum required number on a ship must（）.
单项选择题 Any extinguishing agent used on a Class “C” fire must have which important property? （）
单项选择题 Antares is found in what constellation?（）
