①惺忪:____
②得逞:____
-- ______ father took part in the charity activity in the neighbourhood yesterday?
-- Peter's.
2.87×0.7____0.7 110.9×0.3____110.9
许多细菌和真菌对人类是有益的.下列属于合理利用细菌的是( )
两个圆柱的体积相等,表面积也一定相等.