哪些临床特征提示目前抑郁发作可能有潜在发展为双相障碍的风险()
A.发病年龄早
B.边缘型人格障碍
C.生物节律性明显
D.混合性、非典型或激越性抑郁
参考答案:A, B, C, D
Yuan Longping devoted himself to _____ hybrid rice. [ ]
A. research
B. researched
C. researching
D. researches
发动机怠速,不开空调的转速是()
A.700
B.1200
C.2000
D.2500