MSC至BSC的接口称为()接口,BSC至RBS2000的接口称为()接口.
参考答案:A;A-BIS
所谓“三一律”:要用(),一天内完成一个故事,从开头到末尾维持着舞台充实。
A new big oilfield is reported______in the west of the country.
A.to have been found B.to be found C.found D.having been found