桡腕关节扭挫伤后，X线正侧斜位体可见（）。
A.神经损伤
B.血管损伤
C.骨折
D.软组织损伤
E.无异常表现
参考答案：E
m阶B+树的根结点若不是树叶，则它至少有（）个子女。
A certificated lifeboatman assigned to command the lifeboat should（）.
A.be the first individual to board the craft
B.drain the hydraulic pressure before lowering the craft
C.have a list of the persons assigned to the lifeboat
D.All of the above
