研究发现，砷( As)可以富集在植物体内，转化为毒性很强的金属有机物，影响水稻的株高、根长和干重；加P（与As原子结构相似）处理后水稻茎叶和根中P含量增加、As含量相对减少，水稻生长加快，干重增加。对此现象的解释不合理是           

下列句子中划线的词语运用恰当的一项是（    ）

从右栏中找出左栏的答语。

①Where is Jane? ____                                  A. Three weeks.

②What are they doing? ____                        B. Yes, he is.

③Would you like to play soccer? ____           C. She is in the lab.

④How long can I keep it? ____                     D. Good idea!

⑤Is Tom having lunch at home now?____      E. They are dancing.