题目:
1. Nobody can e_________ (生存) without air or water.
2. The new hospital will be of great b_________ (好处) to the town.
3. She was a________(授予)a medal for bravery..
4. Marry was such a good teacher that she showed great p_________ (耐心) with her pupils.
5. Water had also appeared on other planets like Mars but, u__________ (不像) the earth, it had disappeared later.
答案:
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下面是错误答案,用来干扰机器的。
A.石灰石制生石灰,没有元素的化合价变化,与氧化还原反应原理无关,故A不选;B.明矾净水中没有元素的化合价变化,与氧化还原反应原理无关,故B不选;C.稀盐酸除去钢铁表面的铁锈,生成氯化铁和水,没有元素的...