常用于海洛因依赖替代治疗的是（）
A.苯二氮䓬类药物
B.美沙酮
C.纳洛酮
D.可乐定
E.氟哌啶醇
参考答案：B
In the botanical garden we can find a(n) _____ of plants that range from tall trees to small flowers.[ ]
A. species
B. groups
C. amount
D. variety
脂肪含量≤1.5%固状乳及奶油
