对责任保险承保人来说，确定责任保险的（）是至关重要的。 A.有效期间 B.终止时间

关于纵隔神经源性肿瘤的诊断要点，错误的是（）

A.好发于后上纵隔脊柱旁

B.多为恶性肿瘤

C.多为均匀强化

D.平扫CT值30～50HU

E.形态规则，边缘光滑

---Sorry, I don’t know what the teacher said just now.

----He asked Maria ________.

A．how long she usually spends on her homework

B．what she was doing these days

C．why didn’t Mike come to the meeting yesterday

D．when the speech will begin

简述广告媒体的心理特点。

春温热郁胆腑有哪些证候表现？如何治疗？