At 2004 Athens Olympic Games, Liu Xiang excited people all over Asia when he became the first Asian _______ the gold medal in the men’s 110-meter hurdles.

A．has won

B．won

C．to win

D．winning

在软件开发的各种资源中，（）是最重要的资源。

A开发工具

B方法

C硬件环境

D人员