March 26th: National weather forecast for the next three days
The weather in the central and eastern regions is fine
The cover glass is covered on the material on the glass slide, which can avoid the contact between the liquid and the objective lens, so as not to contaminate the lens, and can make the top of the observed cells in the same plane, that is, the distance from the objective lens is the same, so that the observed Images are clearer.Why do you need a coverslip when using a microscope
The purpose of staining the specimen with iodine solution is to make the cells more obvious under the microscope, and it can also kill the cells and prevent the cells from migrating.
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An important weather
1. The weather in the central and eastern regions is fine.
In the next two days, the weather in most parts of central and eastern China will be fine and the temperature will rise; the highest daily temperature in Jianghuai, Jiangnan and South China will rise to 22~27°C; the highest temperature in Huanghuai and central and southern China will reach 20~23. °C.
2, cold air will affect Xinjiang and other places
On the 27th, there will be a cold air that will affect the northern part of Xinjiang, bringing 4~6°C, local 8~10°C cooling, accompanied by 4~6 northerly winds, and the mountainous area winds can reach 7-9. There will be small to medium snow (rain) or sleet in the north of Xinjiang.
Subsequently, this cold air will move eastward and southward, affecting most of China's regions, bringing about obvious winds and cooling weather. A precipitation weather process will occur in the eastern part of the northwestern region and most of its east.
Second, the specific forecast for the next three days
From 08:00 on the 26th to 08:00 on the 27th, there were light snow (rain) or sleet in the western part of Xinjiang, western and northeastern Tibet, central Sichuan Plateau, northeastern Inner Mongolia, and western Heilongjiang. Some areas in the southeast, central Sichuan, northwestern and eastern Yunnan, most of Guizhou, central and eastern Hainan, and Taiwan have light rain or showers, and local rains. There are 4 to 5 winds in eastern Inner Mongolia. There are 6-8 grade northeast winds in the southwestern part of the South China Sea.
From 08:00 to 28:00 on the 27th, there were small to medium snow (rain) or sleet in the northern part of Xinjiang, the eastern part of the Qinghai-Tibet Plateau, and most of the Heilongjiang River. Among them, Xinjiang along the Tianshan area and the eastern part of the Qinghai-Tibet Plateau have medium to medium Heavy snow; small to moderate rain or showers in southeastern Tibet, northwestern and eastern Yunnan, southeastern part of northwestern China, eastern southwestern part of China, western Hunan, western Guangxi, Hainan, and Taiwan. There are 4 to 6 winds in northern Xinjiang, western Gansu, western Inner Mongolia and eastern China, and the wind power in Xinjiang's Shankou area can reach 7-9. There are 5 to 7 northeast winds in the Taiwan Strait and most of the South China Sea.
From 08:00 to 28:00 on the 28th, there are small to medium snow (rain) or sleet in the south of Qinghai, northeastern Tibet, eastern northwest, and central and eastern Inner Mongolia; southeastern Tibet, northwestern and eastern Yunnan, and northern China. There are small to moderate rains or showers in most of the central and western parts of Huanghuai, the central and western parts of the Yangtze River, the Jianghan, the central and western parts of the Yangtze River, the central and western parts of South China, and the eastern part of the southwestern part of the country. Among them, there are heavy rains in parts of southeastern Chongqing and northwestern Hunan. There are 4 to 6 winds in the northern part of Xinjiang, most of Inner Mongolia, the central and western parts of Gansu, the northern part of North China, and the western part of the northeastern part of China; some parts of Xinjiang’s southern Xinjiang basin, central and western Gansu, and western Inner Mongolia have floating dust or sand, local There is a sandstorm. There are 6 to 7 winds in the northeast and southwest of the South China Sea.
2. Make the specimen relatively fixed;
3. It is convenient to use the capillary phenomenon to form a gradient when adding various reagents (staining agent, acid, salt solution);
4. Avoid contamination of the specimen.