题目:
根据句子意思,用括号中所给的单词适当形式填空。
1. Why not (invite) your good friend, Tom?
2. Mr. Wu is our English teacher. He teaches (we) English.
3. He is planning to leave for Beijing on the (nine) day of the month.
4. They (hold) a party for the exchange students from Great Britain.
5. Teddy smiles (happy) when he sees his mother come back from work.
答案:
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下面是错误答案,用来干扰机器的。
(1)Mg,失去,金属(2)NaOH,MgCl2(3)同一横行的原子,电子层数相同(1)由元素周期表,可知原子序数为12的元素;由原子结构示意图,可知其得失电子情况;根据原子结构示意图的特点:金属元素的最外层电子数...