2. Every 100g apple contains carbohydrate 8 1g, fat 0. 10g, protein 0.26g and cellulose 4g.

3. Apple belongs to Rosaceae, which is the most important fruit in China and the most widely planted fruit with the highest yield in the world.

4. It tastes sweet and sour and is nutritious.

5. According to the measurement, every hundred grams of apple contains 5-2g fructose, 5-5g glucose and 0-2g sucrose.

6. The nutritional and medicinal value of apples can be seen from this.

7. Apple is very suitable for children, the elderly and the sick because of its comprehensive nutrition and easy digestion and absorption.

8.？ Apple has the reputation of wisdom fruit and memory fruit.

9. People have long found that eating more apples can enhance memory and improve intelligence.

10. According to research, zinc is a component of many important enzymes in human body and a key element to promote growth and development.

1 1. Zinc is widely involved in the metabolism of protein, fat and sugar in the body through enzymes.

12. Zinc is also an essential element of nucleic acid and protein closely related to memory.

13. zinc deficiency will make the hippocampus on the edge of the cerebral cortex stunted and affect memory. Experiments have also proved that reducing zinc in food will seriously hinder children's memory and learning ability.

14. Zinc is also closely related to the production of antibodies and the improvement of human immunity.