Phân biệt vật chất ở góc độ trừu tượng và góc độ cụ thể. Cho ví dụ chứng minh

How does cloud cover affect how much infrared light is reflected back to the ground?

Part d most of the group decides to use the wood to build a fence, which would divide the island from the beach. but some people don't want to use the wood for that purpose. do you think it would be fair to make those people build the fence?

Describe how a person can have both high and low self-esteem.