A:what she is cooking
B:what is she cooking
C:what she was cooking
D:what was she cooking
一块质量为1千克的冰熔化成水后,质量( )
已知两点M1(﹣1,﹣6)、M2(3,0),点N(-73,y)分有向线段M1M2→所成的比为λ,则λ、y的值为( )