A.5.0%~10.0%B.5%~15.2%C.5.0%~15.0%D.5.0%~20.0%
A.必須嚴格B.不必C.根據情況D.適當
A.不必派人員監(jiān)護B.必要時派專人監(jiān)護C.直接施工