听力原文: Scientists say that nighttime flights are much more damaging to the environment than daytime air travel. In new research published in journal Nature, they say vapor trails produced by aircrafts do far more damage during the night. The reason is condensation water vapor emitted from hot...
Remembering & Recalling Critical Information BecomesEasyWith This... Stop needlessly forgetting! Enter your email below to get instant access to myexclusive coursethat will show you how to MASSIVELY improve your memory so you canremember important conversations, what you read, and even learn new ski...
The central limit theorem is an often-used statistical theory stating that the distribution of averages becomes more normal, narrower, and centralized as the sample size increases. The theory is widely used in finance to analyze an extensive collection of funds and estimate portfolio distributions ...
How do I calculate the density of the Earth? Note the mass of Earth in kilograms, which is 6×1024 kg. Look up the volume of the Earth in m3, which is 1.1×1021 m3. Divide the mass by the volume. You will then have calculated the average density of the Earth and get a value of...
Scientists study the ocean in many different ways. Although many marine(海洋的) scientists focus on animals in the ocean others seek to gain a better understanding of the ocean’s chemical and physical components (组成部分). Scientists are learning a great deal about the natural and human-caused...
The second activity’s start time would be the end time of the first activity. Its end-time would be the start time + the duration. Do this for all the activities in every sequence, like this: Now, look at the last activity in each sequence. The figure to its right would tell you ...
It is necessary to increase people's awareness about the impact of their cars and home heating systems on the air quality. How can you counteract the spread of pollution? It doesn't take that much! You can do this through the following: Replacing solid fuels stoves and boilers (e.g., ...
For example, a dating app company might use measures of central tendency to determine the average age of its users. Measures of dispersion measure how data is distributed across a range. For example, HR may use measures of dispersion to determine what salary to offer in a given field. ...
In traditional production plants, current technologies do not provide sufficient context to support information integration and interpretation. Digital transformation technologies have the potential to support contextualization, but it is unclear how this can be achieved. The present article presents a selecti...
Improved estimate of global gross primary production for reproducing its long-Term variation, 1982-2017. Earth Syst. Sci. Data 2020, 12, 2725–2746. [Google Scholar] [CrossRef] Huang, X.; Zheng, Y.; Zhang, H.; Lin, S.; Liang, S.; Li, X.; Ma, M.; Yuan, W. High spatial ...