此病人最可能的诊断是
A．高位急性阑尾炎B．胆囊腺瘤性息肉C．十二指肠溃疡穿孔D．急性胰腺炎E．胆囊结石
参考答案：E
I think our boat can pass the treacherous water ______ cautiously handled.
A．until
B．if
C．lest
D．with
简述肾性高血压发生机制。
