【单选题】The main factor in changing the amount of heat on the earth is __.
A.
man's agriculture and industry ways
【单选题】The main factor leading to a huge underfed population in developing countries is ______.
【单选题】十二经脉中相表里的两经的交接部位是 ( )
【单选题】Nutrition is a main factor for a man to live longer.
【简答题】What is the main factor that attracts people come to a place?