The father expected the twins to be doctors, but _______ of them liked to study medicine.
A:both
B:neither
C:all
D:none
①前者只承认绝对运动否认相对静止
②后者只承认静止而否认运动
③后者揭示了运动和静止的辩证关系
④前者属于主观唯心主义观点
非典型肺炎是由下列哪种病原体引起的( )