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An example of the Landolt C eye chart (also known as the Japanese eye chart). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
5 Blood group B has its highest frequency in the Middle East , where it ranks as the largest share of the population. In Southeast Asia its share of the population is lowest, especially in Indonesia, secondarily in East Asia , Northern Asia and neighboring Central Asia , and its incidence diminishes both towards the east and the west , falling ...
CO 2 emissions from the top 10 countries with the highest emissions accounted for almost two thirds of the global total. Since 2006, China has been emitting more CO 2 than any other country. [ 9 ] [ 10 ] [ 11 ] However, the main disadvantage of measuring total national emissions is that it does not take population size into account.
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the social sciences (e.g., economics, psychology, and sociology), which ...
The vernacular form is Cameroonian French. French is the mother tongue of a vast proportion of young Cameroonians living in urban centers. In Cameroon, 63.7% of the population aged 15 and older in Douala and 60.5% in Yaoundé can read and write French; an additional 13–15% can speak French without being able to write it. [46]