主题:科普知识 体裁:说明文 难度:★★★ 建议用时:7分钟 正确率: /4
思维品质 逻辑思维 The Magic of Baking Soda
Do you know what baking soda is? Baking soda, also known as sodium bicarbonate, is a common chemical substance in our daily lives. It looks like white powder and has many amazing uses.
One of the most interesting uses of baking soda is in making food. When we bake cakes or bread, adding a little baking soda can make them rise. It reacts with the acid in the food ingredients, producing carbon dioxide gas. These tiny gas bubbles make the food soft and fluffy. Have you ever wondered why some cakes are so light and spongy? Baking soda is one of the secrets!
Baking soda is also great for cleaning. It can remove stains and bad smells. For example, if there is a stain on the kitchen counter, you can make a paste with baking soda and water, and then rub it on the stain. The stain will be easily cleaned away. And if your fridge smells a bit strange, putting an open box of baking soda inside can absorb the bad smell.
Moreover, baking soda has some health benefits. Gargling with a solution of baking soda and water can help soothe a sore throat. It can also help balance the pH level in our mouth, which is good for our oral health.
However, although baking soda is very useful, we should use it properly. Using too much baking soda in food can make it taste bitter. And when using it for cleaning, make sure to rinse the surface thoroughly to avoid any residue.
So, the next time you see baking soda in your kitchen, remember its many magical uses!
()19. What is baking soda also called?
A. Sodium chloride. B. Sodium bicarbonate.
C. Calcium carbonate. D. Potassium permanganate.
()20. Why do we add baking soda when baking cakes?
A. To make the cakes more colourful.
B. To make the cakes rise and become soft.
C. To make the cakes taste sweeter.
D. To make the cakes last longer.
()21. What can baking soda do for cleaning?
A. It can make the cleaning tools last longer.
B. It can make the cleaning process faster.
C. It can remove stains and bad smells.
D. It can make the surface shiny.
()22. What might happen if you use too much baking soda in food?
A. The food will become more delicious. B. The food will become too hard.
C. The food will taste bitter. D. The food will become too soft.

【语篇解读】本文是一篇说明文,主要介绍了小苏打的用途和相关问题。
19. B 细节理解题。根据“Do you know what baking soda is? Baking soda, also known as sodium bicarbonate, is a common chemical substance in our daily lives.”可知,小苏打的另一个名称是碳酸氢钠。故选 B。
20. B 细节理解题。根据“When we bake cakes or bread, adding a little baking soda can make them rise. It reacts with the acid in the food ingredients, producing carbon dioxide gas. These tiny gas bubbles make the food soft and fluffy.”可知,在烘焙时加入小苏打能与酸反应产生二氧化碳气体,使食物变得松软。故选 B。
21. C 细节理解题。根据“Baking soda is also great for cleaning. It can remove stains and bad smells.”可知,小苏打能去除污渍和异味。故选 C。
22. C 细节理解题。根据“Using too much baking soda in food can make it taste bitter.”可知,过量使用小苏打会使食物发苦。故选 C。