有必要对这些区域进行频繁检查。
A.It is necessary to generally check these areas. B.It is imperative to regularly inspect these areas. C.Frequent inspection of these areas is necessary.正确答案C
有必要对这些区域进行频繁检查。
A.It is necessary to generally check these areas. B.It is imperative to regularly inspect these areas. C.Frequent inspection of these areas is necessary.正确答案C
