A microorganism, or microbe,[a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s, Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera, diphtheria, and anthrax.
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Rik57
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 480 x 451 | JPG | 13 | |
標準授權 | S | 800 x 751 | JPG | 15 | |
標準授權 | M | 2048 x 1923 | JPG | 18 | |
標準授權 | L | 2307 x 2166 | JPG | 20 | |
標準授權 | XL | 2918 x 2740 | JPG | 22 | |
標準授權 | MAX | 3574 x 3356 | JPG | 23 | |
標準授權 | TIFF | 2896 x 2720 | TIF | 39 | |
進階授權 | WEL | 3574 x 3356 | JPG | 88 | |
進階授權 | PEL | 3574 x 3356 | JPG | 88 | |
進階授權 | UEL | 3574 x 3356 | JPG | 88 |
XS
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M
L
XL
MAX
TIFF
WEL
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標準授權 | 480 x 451 px | JPG | 13 點 |
標準授權 | 800 x 751 px | JPG | 15 點 |
標準授權 | 2048 x 1923 px | JPG | 18 點 |
標準授權 | 2307 x 2166 px | JPG | 20 點 |
標準授權 | 2918 x 2740 px | JPG | 22 點 |
標準授權 | 3574 x 3356 px | JPG | 23 點 |
標準授權 | 2896 x 2720 px | TIF | 39 點 |
進階授權 | 3574 x 3356 px | JPG | 88 點 |
進階授權 | 3574 x 3356 px | JPG | 88 點 |
進階授權 | 3574 x 3356 px | JPG | 88 點 |