根据第一段最后一句"..thetotal world population of mountain goillas has risenin the last two years from 786 to 880."可以推知该句指“大猩猩的数量在增加”。2.C推理判断题。根据第二段中最后两句“Thelow number was a result of illegal hunting, habitatloss, and disease. Since then, the ...