生态系统的营养结构是[ ]
A．非生物的物质和能量
B．食物链和食物网
C．生产者和分解者
D．各级消费者
答案：B
Women prefer to think and then speak, while men like to speak as they _________.
A．think
B．have thought
C．thought
D．are thinking
知柏地黄汤治疗经行口糜的适应证候是（）
A.胃热熏蒸证
B.肝肾阴虚证
C.肾阴不足证
D.湿热瘀结证
E.阴虚火旺证
