The man with a scar across his face is said _________ many valuable items from the museum.

A．having stolen

B．to steal

C．stealing

D．to have stolen

质量相等的实心铜块和铁块，体积较小的是______；体积相等的水和酒精，质量较小的是______；两瓶矿泉水，体积大的，质量较______．（已知ρ_铜＞ρ_铁）