下列多项式中,能用公式法分解因式的是( )
A:x2-xy
B:x2+xy
C:x2-y2
D:x2+y2
Huang Xiaoming and Angelababy over 10,000,000 yuan to help the poor in 2015.
补全单词。
①My parents have ret____ed.(退休的)
② She worked in the f____lds(田地).