颈部手术引起术后痛的主要原因是()
A.咳嗽
B.吞咽动作
C.渗血
D.切口感染
E.血肿压迫
参考答案:A, B
I've made a mistake, though _____ . [ ]
A. interided to
B. intended
C. didn't intend
D. didn't intend to
已知两码组为0000、1111。若用于检错,能检出()位错;若用于纠错,能纠正()位错。