Home to______and gangsters, officials and laborers, refugees and artists, thecity was, in its prime, a metropolis that exhibited all the hues of the human character.

A．magnates

B．magnets

C．machines

D．magnitudes

逆调压时，要求高峰时不高于（）Un。

A.1.0

B.1.025

C.1.05

D.1.075