The monument was built in honor of the explorer who was believed＿＿the big river.

A．to have discovered

B．to have been discovered

C．to be discovered

D．having been discovered

电气装置的交接试验中，凡吸收比小于( )的电动机，都应先干燥后再进行交流耐压试验。

A．1.0

B．1.1

C．1.2

D．1.3