甲状腺次切除术后3天出现手足抽搐,其原因是()
A.两侧喉返神经损伤
B.喉上神经内、外侧支损伤
C.甲状腺危象
D.切口内出血
E.甲状旁腺损伤或误切
参考答案:E
My uncle said that he________us. [ ]
A. will visit
B. has been visiting
C.would visit
D.is going to
如果对于2微秒脉冲宽度,收发开关时间为0.5微秒,则最小可探测距离应约为()米。