在密闭容器中加入\(\rm{2.0mol}\) \(\rm{SO_{2}}\)和\(\rm{1.0mol}\) \(\rm{O_{2}}\)，一定条件下发生如下反应\(\rm{2SO_{2}+O_{2}⇌2SO_{3}.}\)反应达到平衡后，各物质的物质的量可能为\(\rm{(}\)　　\(\rm{)}\)

	\(\rm{n(SO_{2})/mol}\)	\(\rm{n(O_{2})/mol}\)	\(\rm{n(SO_{3})/mol}\)
\(\rm{A}\)	\(\rm{2.0}\)	\(\rm{1.0}\)	\(\rm{0}\)
\(\rm{B}\)	\(\rm{1.0}\)	\(\rm{0}\)	\(\rm{1.0}\)
\(\rm{C}\)	\(\rm{0.20}\)	\(\rm{0.10}\)	\(\rm{1.80}\)
\(\rm{D}\)	\(\rm{0}\)	\(\rm{0}\)	\(\rm{2.0}\)