Human body obtaining food energy: The chemical energy that human beings acquire from healthy or nutritious food materials for living and performing...Become a member and unlock all Study Answers Start today. Tr
However, some of the apparent difference is due to the fact that higher factors were used to calculate the energy derived from protein, fat and carbohydrate in the 1930's and 1940's than were used later; if the later factors are applied to the results of the earlier surveys the values ...
根据第二段 "The food chain is endangered anywhere humans have had an effect on the natural environment." 可知,人类的过度捕猎、过度捕捞和过度砍伐等行为已经给食物链带来了很大的威胁,第三段列举的是过度捕杀鲨鱼的例子,以此来说明人类活动对食物链产生的威胁,故选A。 (3) 写作意图题。文章主要讲的是...
Changes in agriculture, policy and personal behaviors can reduce the energy a nation uses to feed itself and the greenhouse gases it emits
(C)The human(人类) body needs energy, which is provided by the food we eat. But how much do we need to stay healthy?Calories(卡路里) usually decide the energy value(价值) of food. To raise the temperature of 1g of water by 1 C needs one calorie. The number of calories people need...
The chart shows the proportion of renewable energy in total energy supply in 4 countries from 1997 to 2010. Summarize the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words. Task 1 柱状图 - - 范文 答题 Some people argue th...
The calorie is the unit for food energy. One calorie is the amount of energy it takes to increase the temperature of one milliliter of water by one degree Celsius. Since calories measure energy, calorie requirements vary depending on how active a person is and their size. ...
This way, the oxpeckers get the food they need to live.1. What does a food chain help us understand? A. How producers make food. B. How consumers eat plants or animals. C. How related food chains form a food web. D. How energy moves from one living thing to another.2. Why are...
The ultimate goal of innovation is practical application. IP commercialization helps move lab discoveries to the production line. In Daqing Oilfield Limited Company, a major energy production base in Heilongjiang Province, IP has been incorporated into its long-term development strategy. The oilfield ha...
energy to stay alive and grow, and they get it from sunlight instead of food.How does a plant grow?Most animals grow in a certain way, and genes control their growth. That is to say, even when they are small, it's easy to know what they will look like after they grow up. Plants...