选择题：It ______ exactly thirty years since I graduated f

题目内容：

It ______ exactly thirty years since I graduated from college. A was
B has been
C will be
D had been

参考答案：

硐室施工断面按自上而下的顺序逐层进行，且相邻两个分层工作面保持一定错距，这种施工方法称

硐室施工断面按自上而下的顺序逐层进行，且相邻两个分层工作面保持一定错距，这种施工方法称A 倒台阶工作面施工法B 下行分层施工法C 上行分层施工法D 导硐施工法

I strongly object as it will do great harm to his health.A to my

资产负债表的下列项目中，需要根据几个总账账户的期末余额进行汇总填列的是（）A 短期投资B 短期借款C 货币资金D 累计折旧

The work in the office was ________ by a constant stream of visitorsA confusedB

企业的下列报表中，属于对外的财务报表的有（）A 资产负债表B 利润表C 费用明细表D 制造成本表E 现金流量表