件生产以大径定心的外花键时,在铣床上一般可用()加工。
A.直齿三面刃铣刀
B.键槽铣刀
C.组合铣刀
D.成形铣刀
参考答案:A
But for their help, we ____ the program in time.
A.can not finish
B.will not finish
C.had not finished
D.could not have finished
上腹部手术拆线时间一般为术后5~6天。