1. Hãy chỉ ra 5 điểm khác nhau cơ bản giữa cạnh tranh và độc quyền 2. Độc quyền ra đời đã thủ tiêu cạnh tranh đúng không? Vì sao?

Pleas give me brief explanation about deterministic model in advanced hydrology

The biome pictured above is found in areas such as kenya and south africa. the land is grass-covered with very few trees and gazelles and other grazers are common here. why does this biome have a low population of trees? a) large grazing animals destroy the trees. b) it is a deforested rainforest with poor soil. c) it has high temperatures and low precipitation. d) it has a long rainy season followed by flooding.

Dr. williams conducted a survey in the mall, measuring the shopping habits of people ages 15, 25, 35, 45, and 55, with 10 people in each group. which of the following best describes her study? an experiment a cross-sectional study a case study a longitudinal study a double-blind study