How to study effectively

As students, we study almost every day. However, how can we study effectively? Maybe not everyone knows. Look at the chart below, we may have a better understanding of this.

This chart shows the relationship between study efficiency and study time in a day. From it, we can see that more study time does not necessarily lead to better or higher learning efficiency. In this figure, when a person studies for about 5.5 hours, the optimal amount of efficiency or the optimal value of efficiency is es. However, as he studied for more than 5.5 hours, his efficiency began to decline. When a person studies 10 hours a day, his learning efficiency may be zero.

In a word, the efficiency and time of study are always the highest in a day. Spending more time on study does not always mean better efficiency. This may tell us how to study effectively. (model essay. )?

Sample 2

Natural gas production in China

With the rapid economic growth in China, the demand for fuel resources is increasing. Among them, natural gas is clean, convenient and cheap. The above figure shows China's natural gas production 199 1 and 1995.

As can be seen from the chart, its output has been increasing steadily since 199 1. 199 1 year, the natural gas produced in China is only15.5 billion cubic meters. Since then, there has been a steady growth of 500 million cubic meters almost every year. By 1995, the output increased to 175 billion cubic meters, which was about 13% higher than 199 1.

There are many factors that lead to the substantial increase of its output. Just to mention a few examples, greater industrial demand, demand from daily life, convenience and cleanliness, etc. Stimulate its output to increase.

In a word, we can safely predict that the output will continue to increase in the foreseeable future due to the increasing demand for output.