什么是挖基础土方？
In the case of new crude oil tankers，the additional ballast permitted shall be carried in cargo tanks only if such tanks have been（）before departure from an oil unloading port or terminal. ["inerted","crude oil washed","diluted","cleaned"]
CO2可以扑救金属火灾。
钢丝绳定期润滑的作用是什么？
关于某钢铁公司并购一石油公司的论述，正确的是（） ["属纵向并购，但易受反垄断法的限制","属混合并购，以分散投资，降低经营风险","属购买式并购，以取得石油公司的经营权","属横向并购，目的在于多种经营，扩大企业规模"]
起重机用钢丝绳的日常检查应重点检查哪些部位？
