The first men to study the nature of electricity could not imagine that their experiments, carried on because of mere intellectual curiosity, would eventually lead to modern electrical technology, without which we can scarcely () contemporary life.

A. get hold of

B. conceive of

C. get the better of

D. take advantage of

季度财务会计报告的保管期限为______。

A．3年
B．5年
C．10年
D．15年