After         series of unsuccessful attempts, he has finally passed           driving test.

A．不填；the

B．a；the

C．the；a

D．不填；a

怀疑有腹腔脏器破裂及出血时（）

A.血气分析

B.做胸腔穿刺检查

C.做腹腔穿刺检查

D.监测中心静脉压

E.放置导尿管检查