如果四个互不相同的正整数m,n,p,q满足(6-m)(6-n)(6-p)(6-q)=4,那么m+n+p+q=( )
“今背本而趋末,食者甚众,是天下之大残也。”这表明作者主张
They _______ 20,000 yuan for the Project Hope last year.
A.天然气 B.沼气 C.木柴 D.____.