单选题This passage is mainly about ______.Athe different ways of preserving foodBwhy we must kill the bacteria in our foodCthe importance of preserving foodDhow to preserve food by cooking and salting
单选题
This passage is mainly about ______.
A
the different ways of preserving food
B
why we must kill the bacteria in our food
C
the importance of preserving food
D
how to preserve food by cooking and salting
参考解析
解析：
本题考查文章的主旨。在第一段作者介绍了保存食物的原理，从第二段起开始介绍保存食物的各种方法，如冷冻法、烹饪法、晒干法、盐腌法以及添加化学成分法。因此文章的主旨是保存食物的不同方法，答案选A)。
本题考查文章的主旨。在第一段作者介绍了保存食物的原理，从第二段起开始介绍保存食物的各种方法，如冷冻法、烹饪法、晒干法、盐腌法以及添加化学成分法。因此文章的主旨是保存食物的不同方法，答案选A)。
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