1×3I钢绞线公称直径规格的是()。
A.8.74mm
B.8.47mm
C.8.60mm
D.6.50mm
参考答案:A
In my opinion, work provides us much ______ just salary and income; it also helps us realize our dreams
and makes us feel confident. [ ]
A. rather than
B. other than
C. better than
D. more than
井下机械维修工必须具备一定的钳工基本操作及液压基础知识,经过培训并考试合格后,方可持证上岗。()