像家蚕这样,在由受精卵发育成新个体的过程中,幼体与成体的____ 和____ 差异很大,这种发育过程称为____ .
如图,已知点D、E分别在△ABC的边BA、CA的延长上,下列给出的条件中,不能判定DE∥BC的是( )
-- Do you have any plans for this Sunday?
-- I'm not sure. I ______ go to the countryside to see my grandmother.