Which of the following is mentioned by the author as a reason why the baleen whale population has been reduced?
A.
Increased pollution of the seas.
B.
Hunting.
C.
Insufficient supply of food.
D.
Disease.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】靶向制剂亦称靶向给药系统(targeting drug delivery system,TDDS),是通过载体使药物选择性的浓集于病变部位的给药系统,病变部位常被形象的称为靶部位,它可以是靶组织、靶器官,也可以是靶细胞或细胞内的某靶点。靶向制剂不仅要求药物到达病变部位,而且要求具有一定浓度的药物在这些靶部位滞留一定的时间,以便发挥药效,成功的靶向制剂应具备定位、浓集、控释、无毒及可生物降解等要素。...