具有凉血止血散瘀功效，尤善治尿血的药物是（）
A.白茅根
B.小蓟
C.血余炭
D.地榆
E.茜草
参考答案：B
______ to computer games, the boy began to dislike school, which made his parents worried.
A．Related
B．Addicted
C．Connected
D．Used
根据自然保护区的重要程度和影响大小，可将其分为（）
A.一级和二级
B.国家级、省级、市级和县级
C.国家级和世界级
D.国家级和地方级
