Theplantsneedsandwitha___(deep)ofatleast10to15cmtogrow.
理想气体处于平衡态时压强为p，温度为T，玻尔兹曼常数为k，则该气体的分子数密度n=____________.
Anypolicythatmayleadtotheriseinunemploymentislikelytomeetwithstrong___(resist)
Itisessentialthateverythinginadvance.（）
产生感生电动势的非静电力是感生电场对电荷的作用力，产生动生电动势的非静电力是__洛伦兹____力.
