（）属于老年性生活认知偏差的主要表现。

A.在性的方面已无能为力

B.一滴精十滴血

C.老年少性

D.老年无性

In December 2008, Obama was _________________.

A．elected the President of the USA

B．selected the President of the USA

C．elected President of the USA

D．selected President of the USA