下列哪种骨折容易并发血管损伤
A．肱骨干骨折B．肱骨髁上骨折C．尺骨干骨折D．桡骨远端骨折E．股骨颈骨折
参考答案：B
________ around the Water Cube, we were then taken to see the Beijing National Stadium, known as the Bird’s Nest。
A．Having shown
B．To be shown
C．Having been shown
D．To show
地震剖面上反射波的对比实际上就是对（）的对比追踪，它是相邻地震道之间同一相位的波峰或波谷的连线。
A.强振幅
B.同相轴
C.波形
D.强相位
