【多选题】土壤污染具有哪些特点,在一定程度上掩盖了土壤污染的严重性。
【简答题】土壤污染的特点: 土壤污染具 有 ( )、 土壤污染具 有 ( )、 土壤污染具 有 ( )、 土壤污染具 有 ( ).
【简答题】The pills I often take are fast pain relievers.
【单选题】树是 n ( n≥0 )结点的有限集合, 在一棵非空树中,有()个根结点,其余的结点分成 m ( m > 0 )个 ()的集合,每个集合都是根结点的子树。
【单选题】The pills are ______ in sugar and easy for children to swallow.
【单选题】The pills are______________ in sugar and easy for children to swallow.
【简答题】The pills are __________ in sugar and easy for children to swallow.
【判断题】Some critics are alarmed by the prospect of developing the pills tha thelps to forget.