痰饮、瘀血、结石的形成均与下列哪项有关（）
A.血热
B.气滞
C.气虚
D.寒凝
E.湿热
参考答案：B
Some animals carry seeds from one place to another, ______ plants can spread to new places.
A．so
B．or
C．for
D．but
