【单选题】Even students of average intelligence ________ become top students by improving their study habits.
【单选题】At the class meeting, some top students introduced several ________ to the study of English. [ ]
【单选题】下列关于影响土体渗透系数的因素描述中正确的是( ) 1粒径大小和级配;2结构与孔隙比;3饱和度;4矿物成分;5渗透水的性质。
【单选题】At the class meeting, some top students introduced several ____ to the study of English. [ ]
【简答题】渗透率和渗透系数是描述含水层_____的参数,影响渗透系数大小的主要因素是_____和_____,随着地下水温度的升高,渗透系数_____。