In the celestial equator system of coordinates what is equivalent to the colatitude of the Earth system of coordinates （).

The scoring system is much looser in the UK than in the U.S.（)

听力原文：Hurricanes are storms that often begin in the Atlantic near the equator and then

The error in a sextant altitude caused by refraction is greatest when the celestial body i

（)is the distance east or west measured in degrees，minutes and seconds of arc on the equat

Based on the chemical equation in the passage, in a ZAB, as 5 02 molecules are consumed, h

The public transport system in many cities in the world （) by the local authority.