下列各项不属于动物社会行为重要特征的是[ ]
A.群体内部有一定的组织
B.成员之间有明确地分工
C.同一群体个体之间的相互识别
D.群体中形成等级
答案:C
Mr. Brown is an experienced doctor. He is always when faced with emergency.
A.as poor as a church mouse
B.as busy as a bee
C.as cool as a cucumber
D.as strong as a horse
某男,46岁。诊断为乙肝10年。近日出现持续性肝区疼痛,消瘦,发热,食欲不振,乏力,营养不良。应考虑
A.慢性迁延性肝炎B.肝癌C.肝硬化D.肝脓肿E.肝血管瘤