We're in class. You'd better not _______.　　[ ]

A. talk

B. talking

C. talked

D. to talk

抑郁发作的临床表现不包括

A．显著而持久的情感低落

B．思维迟缓

C．生活疏懒，行动迟缓

D．睡眠增多

E．情感有昼重夜轻的特点