婚姻法规定,有负担能力的兄姐,对未成年的弟妹,承担()义务。
参考答案:扶养
下列因式分解正确的是( )
A.m2+n2=(m+n)(m-n)
B.a2-a=a(a-1)
C.(x+2)(x-2)=x2-4
D.x2+2x-1=(x-1)2
______sounded unimaginable to everyone present was______ she had managed to finish the task in a week.
A.What; how
B.It; how
C.It; that
D.What; that