Was it ________ the conference of APEC that made Shanghai the focus of the world then?

A．holding

B．to hold

C．held

D．having held

关于术后病人早期活动的优点，下列说法不恰当的是( )

A．增加肺活量，减少肺部并发症

B．减少下肢静脉淤血及血栓

C．有利于肠道功能恢复、减少腹胀

D．有利于减少切口感染

E．有利于膀胱功能的恢复、减少尿潴留