下列哪种检查，不适合于泌尿系统新鲜损伤（）
A.大剂量静脉肾盂造影
B.逆行肾盂造影
C.B超检查
D.CT检查
E.肾动脉造影
参考答案：B
________of recent political developments, he was taken by surprise upon his arrival in the capital.
A．Unexpected
B．Unacquainted
C．Unaware
D．Unknowing
