活动性十二指肠球部溃疡钡餐的X线影像特征是（）
A.空回肠换位征
B.阶梯状液平
C.跳跃征
D.激惹征
E.咖啡豆征
参考答案：D
I would have attended your birthday party last night but for the fact that it ______ at that time. [ ]
A. would rain
B. was raining
C. had rained
D. had been raining
内收型尺骨上1/3骨折合并桡骨头脱位移位特点是（）。
A.尺骨骨折向掌侧成角
B.尺骨骨折向背侧成角
C.桡骨头向桡侧脱出
D.桡骨头向掌侧脱出
E.桡骨头向背侧脱出
