（1）把外层电子排布与氩原子的电子排布相同的两种阳离子和两种阴离子依其离子半径由小到大顺序排列为　 ____　．这四种离子间形成离子化合物依其式量由小到大的顺序排列为 ____

（2）A⁺、B^﹣、C、D四种微粒中均有氢原子，且电子总数均为10个．溶液中的A⁺和B^﹣在加热时相互反应可转化为C和D．则A⁺的电子式为 ____　，B^﹣的电子式为　 ____　．

（3）4g D₂和20g ¹⁸O₂的单质化合时最多能生成　 ____　g D₂¹⁸O，这些D₂¹⁸O分子中含　 ____　mol 质子，含　____mol中子，

（4）在下列化合物中：H₂O₂、Na₂O、I₂、NaCl、CO₂、NH₄Cl、Na₂O₂，用化学式回答下列问题：

①只由非金属组成的离子化合物是　 ____　，

②只有极性共价键的共价化合物是　 ____　，

③只含有非极性共价键的是　 ____　，

④既有离子键又有非极性键的化合物是　 ____　．

99添上1是____    100里面有____个十

植物根尖吸收水分和无机盐最活跃的部位是（  ）

判断，对的写"正确"，错的写"错误"。

    Hi, I'm Cathy. Today is Ann's birthday. I'm going to her birthday party. But my old dress is too small for me now. I want a new one.

Now I'm in the store. Wang Ling is there too. She is buying a gift to Ann. She is buying a toy panda. The dresses in the store are beautiful, there are many colors. I like the red one. Red is my favorite color. But it's too expensive; it's eighty-five yuan! That pink one looks good, too. And it's just right for me! It's cheap, it's thirty-two yuan. And I buy a gift for Ann, too. It's a whistle.

    I'm wearing my new pink dress to Ann's birthday party. Ann likes the whistle a lot and she likes the toy panda, too.