上臂受伤后出现腕下垂，此时最可能是：（）
A.锁骨骨折
B.肩关节脱位
C.肱骨颈骨折
D.肱骨干骨折
E.肱骨髁上骨折
参考答案：D
写出方程未知数的解：已知3.6x-0.9x=10.8，则x=______．
People ______ say “me”, “myself” and “I” frequently are more likely to suffer with depression and anxiety, according to a new research.
A．whoever
B．whom
C．whomever
D．who
