肱骨干中下段骨折或手术最容易造成的并发症是
A．肌皮神经损伤
B．正中神经损伤
C．桡神经损伤
D．肱动静脉损伤
E．腋神经损伤
参考答案：C
x+4=0既是一个等式，也是一个方程。[ ]
No matter how _____, you can find something animate, a kind of plant, an animal or human being.
A．may a desert be dry
B．a desert dry may be
C．dry a desert may be
D．a desert may be dry
