A:农民土地所有制
B:地主土地所有制
C:集体土地所有制
D:土地共同拥有制
下列有关化学用语能确定为丙烯的是( )
---- Excuse me, could you please tell me the way to the nearest hospital?
---- I'm sorry, _I am new here. You can ask the policeman over there.