10. Hearing the news, he rushed out, _______the book _______ on the table and disappeared into the distance.

A．left; lain open

B．left; lay opened

C．leaving; lie opened

D．leaving; lying open

物质的下列性质不能用键能来解释的是(　　)

A．氮气的化学性质没有氯气活泼

B．HF比HCl稳定

C．金刚石的熔点比晶体硅高

D．常温下溴呈液态，碘呈固态