某些化学键的键能(kJ/mol)如下表所示：

植物需要量最大的是含____ 、____ 、____ 的无机盐，除此之外还需要一定量的“微量元素”，如铁、硼等。

下面三对数值：（1）$\left\{\begin{array}{c}x=2\\ y=2\end{array}\right.$（2）$\left\{\begin{array}{c}x=3\\ y=2\end{array}\right.$（3）$\left\{\begin{array}{c}x=-2\\ y=3\end{array}\right.$是方程$2x-y=4$的解的是（   ）

根据所给提示，完成句型转换，每空一词，含缩略词。
(1)Tom won't visit the farm. He'll stay at home. (同义句)
Tom will stay at home ____ ____ visiting the farm.
(2)This dress cost her 100 yuan. (改为一般疑问句) 
____  this dress____  her 100 yuan?
(3)London held the first World Expo in 1851. (对划线部分提问)
____  did London____  the first World Expo?
(4)请安静，我将给大家分发试卷。（完成译句）
Be quiet, please. I'm going to____ ____  your test paper.