Cocaine is a powerfully addictive drug. Users become ____  to it easily if they smoke it because smoking____ （allow) cocaine to reach the brain very____ (quick).

        Users who inject the drug are also in more danger if they share needles ____ other users. ____  (use) cocaine increases the user’s heart rate and blood____ (press).

         As____  result, cocaine users sometimes have heart____ (attack),____ also causes anti-social ____  (behave).

如图，已知△ACF≌△DBE，且点A，B，C，D在同一条直线上，∠A=50°，∠F=40°．

（1）求△DBE各内角的度数；

（2）若AD=16，BC=10，求AB的长．

王强去年的身高是166cm，今年的身高变成了176cm。王强长高的主要原因是(　　)