A.勉強(qiáng)驗收 B.緩期驗收 C.嚴(yán)禁驗收 D.嚴(yán)格驗收
A.8h;4h B.12h;6h C.16h;8h D.24h;8h
A.0.5兆歐 B.1兆歐 C.10兆歐 D.100兆歐