骨折切开复位的适应证是()
A.因肌肉收缩骨折端不易用手法复位对位者
B.关节内骨折
C.骨折端有软组织嵌入
D.骨不连
E.开放性骨折
参考答案:A, B, C, D, E
单项式﹣2πab2的系数是( )次数是( )
He hurled the statue to the floor with such force that it shattered.
A.dropped
B.pulled
C.pushed
D.threw