T cells are made in the____ and complete their differentiation in the____.
A、Spleen; Thyroid
B、Spleen; Thymus
C、Bone marrow; Thymus
D、Bone marrow; Bone marrow;

A．依靠大量用户创造内容，而不仅仅依靠少量专家创造内容
B．依靠数据，而不仅仅依靠软件和硬件
C．依靠软件，而不仅仅依靠硬件
D．依靠服务，而不仅仅依靠软件

A．Cha Cha
B．Waltz
 Waltz
C．Swing Dance
D．Salsa

A．正确
B．错误