上臂部受饬后出现垂腕，此时最可能的是
A．肩关节脱位
B．肱骨干骨折
C．肱骨外科颈骨折
D．肱骨髁上骨折
参考答案：B
9.3÷0.5□9.3×2。□内应填[ ]
A．>
B．<
C．=
I was talking on the phone, Mom came in. [ ]
A．When
B．What
C．While
D．Why
