A:so does Tom
B:neither does Tom
C:so Tom does
D:neither Tom does
已知两点A(1,2),B(3,1)到直线l的距离分别为2,5-2,则满足条件的直线l共有( )条
①C1M∥AC;
②BD1⊥AC;
③BC1与AC的所成角为60°;
④B1A1、C1M、BN三条直线交于一点.