题目普通机床麻花钻钻头的夹角是()。A. 120^circB. 118^circC. 90^circD. 60^circ普通机床麻花钻钻头的夹角是()。A. $120^\circ$B. $118^\circ$C. $90^\circ$D. $60^\circ$题目解答答案B. $118^\circ$