Large quantities of water, as well as some other timely help including a medical team ___since the serious drought hit Yunnan Province.

A．has offered

B．had been offered

C．have been offered

D．is offered

我国《计量法》规定，计量检定工作应当( )。

A．遵循经济合理、就地就近的原则

B．按照国家计量检定系统表进行

C．执行计量检定规程

D．由持有计量行政部门颁发的检定员证的人员执行

E．严格遵守行政区划和部门管辖的限制，不得跨区和跨部门进行