下列式子中,能真实表示分子的组成的是
A.SiO2
B.C
C.NaOH
D.P4
答案:D
内源性抑郁症的特征不包括()
A.早醒
B.晨重晚轻
C.起病有明确的心理社会因素影响
D.三环类抗抑郁药治疗有效
E.多有思维联想的抑制
Mike ______have stolen the money from the bank,______he appeared to be rich overnight.
A.can’t; for
B.might; for
C.must; since
D.can’t; since