骨盆骨折最常见的泌尿系并发症为()
A. * * 外口狭窄
B. * * 膜部损伤
C. * * 假道形成
D. * * 内口狭窄
E. * * 球部损伤
参考答案:B
作匀变速直线运动的物体,在t s内位移的大小只决定于( )
A.物体运动的加速度
B.物体运动初速度
C.物体运动的平均速度
D.物体运动的末速度
Jess was sad and her friends helped her ________ the first awful weeks after her husband Bill died.[ ]
A.break through
B.break down
C.get through
D.get rid of