机组旋转轴的几何中心线就是机组的旋转中心线
参考答案:错
— I regret ______ you that you failed the exam.
— How I regret _____ so much time playing computer games. [ ]
A. telling; wasting
B. telling; to waste
C. to tell; wasting
D. to tell; to waste
造成30人以上死亡的事故属于()。
A.特别重大事故
B.重大事故
C.较大事故
D.一般事故