His new car is different the old one. [ ]
A. on
B. in
C. to
D. from
答案：D
I don’t think the experiment is ______ failure. At least we have gained ______ experience for future success.
A．/ ; the
B．a ; the
C．a ; /
D．/ ; /
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
