Liu Xiang is_________ first Chinese who has won_________ one-hundred-metre hurdle gold medal in the Olympic Games.

A．the;a

B．the;the

C．the;an

D．a;the

很多海生甲藻能发光，如夜光虫遇机械刺激或其他刺激都会发光，产生这一现象和决定该行为的分别是 [ ]

A．代谢与遗传

B．适应性与遗传性

C．应激性和遗传性

D．应激性和适应性