题目

Social media and the mobile web have given rise to a strange phenomenon called the selfie．It refers to a picture of yourself, usually shared on any social networking website．    36   Some selfies are extreme close-ups, and others show part of an arm held straight outward．A few of them even feature the subject standing in front of a bathroom mirror． Everyone takes selfies, but the younger crowd seems to be especially involved in the trend．Young people are relatively heavier digital users．They are interested in staying connected to their friends．  37   There are also用△、□各代表一个数，已知△+□=30，△=□+□+□+□；则△=（____），□=（____）