根据《水利工程建设项目招标投标管理规定》(水利部令第14号),水利工程建设项目的行政监督与管理实行()负责的原则。
A.行业
B.分级
C.地方
D.主管部门
参考答案:B
I didn't expect that so many people ___ to join in the work.
A.had offered
B.were offered
C.would offer
D.used to offer
通信网的基本结构有()型、()型、()型、()型和()型五类。