颈椎骨折脱位经牵引复位后若行头颈胸石膏固定,固定时间约是()
A.1个月
B.2个月
C.3个月
D.4个月
E.5个月
参考答案:C
— Could you tell the differences _____ these two words?
— OK, let me have a try. [ ]
A. behind
B. between
C. across
D. beside
Pentium的突发式存储周期中,包括了 【5】 个时钟周期。