(5分)现有以下常见的物质： A．氯化钠、B．小苏打、C．稀盐酸D活性炭E熟石灰F石灰石。请按要求填空(填字母)：
(1)能吸附冰箱的异味的是 ； (2)能改良酸性土壤的是 ；
(3)蒸馒头时常用到的物质是 ； (4)可用于金属表面除锈的是 ；
(5)生活中可用作调味品的是 。
(1) D ；(2) E ；(3) B ；(4) C ；(5)A 。
题目分析：（1）活性炭具有疏松多孔的结构，具有吸附性，是常见的吸附剂，可以用来除去冰箱中的异味，故答案为：D
（2）改良酸性土壤常用弱碱性的物质熟石灰，故答案为：E
（3）面粉在发酵时会产生有机酸，所以要加入碱性物质来中和酸味，由于小苏打溶液呈碱性，常被用来蒸馒头，故答案为：B
（4）铁锈的主要成分为氧化铁，氧化铁可以和酸反应，所以可以用稀盐酸来除锈，故答案为：C
（5）食盐有咸味，可以作为调味品来使用，故答案为：A
点评：物质的性质决定物质的用途，要熟悉常见酸碱盐的性质。
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| It was a cold winter evening. 1 old man had done his work and was going home from the fields. 2 his way he saw something on the ground. He looked at it and 3 it was a snake (蛇). It was not 4 , but it couldn't move because it was so cold. "Poor thing," the man said, "I must try to save your life." He picked 5 and looked for a warm place to put it in. But how could he find one in 6 cold weather? So he decided 7 the snake inside his clothes, right next to his heart. 8 minutes later, the snake came back to life and began to move. 9 it had become 10 , it gave the man a bite (咬). He killed (杀死) it and went on. When he got back, he was very ill and had to lie down. | ||||
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