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What are sour fruit and sweet fruit?
Sour fruits are:

1, Lemon: Lemon is the favorite food of pregnant women with liver-qi deficiency because of its extremely sour taste, so it is called beneficial to the mother fruit or beneficial to mother and child. Lemon is rich in citric acid, so it is called "citric acid warehouse". Its juice is crispy and fragrant.

2. Grape: Grape is one of the oldest fruit tree varieties in the world. Plant fossils of grapes were found in tertiary strata, indicating that it had spread all over Europe, Asia and Greenland at that time. Grapes are native to West Asia and cultivated all over the world. About 95% of the grapes in the world are concentrated in the northern hemisphere.

3. Pineapple: Pineapple fruit has excellent quality and rich nutrition, and contains a lot of fructose, glucose, vitamins B, C, phosphorus, citric acid and protease. Every 100g of pineapple contains 87. 1g of water, 0.5g of protein, 0. 1g of fat, 0.12g of fiber, 0. 1mg of nicotinic acid, 0. 126mg of potassium and sodium.

4. Myrica rubra: Myrica rubra is a small tree or shrub plant belonging to Myrica of Myrica of Myrtaceae, also known as Shengshengmei, Baitimei and Shu Mei. It has high medicinal and edible value and is distributed in East China, Hunan, Guangdong, Guangxi and Guizhou. Myrica rubra is native to Yuyao, Zhejiang, China. 1973 Myrica rubra pollen was found during the excavation of Hemudu site in Yuyao in Neolithic age, indicating that Myrica rubra grew in this area more than 7000 years ago.

5. Grapefruit: it is found in the south of the Yangtze River in China, and it is cultivated in Xinyang and Nanyang in Henan Province. Southeast Asian countries have planted it. The pulp contains high vitamin C, which can promote digestion and relieve alcoholism.

Sweet fruits are:

1, Emperor Orange: According to legend, Wu Zetian sent ministers to NSW to worship their ancestors, and local villagers gave oranges to each other. When the minister returned to Beijing, he presented them to the emperor for tasting. Wu Zetian praised it after tasting it, so she ordered Xinxing County to pay tribute every year, hence the name Gonggan. Because it is the favorite fruit of the emperor, the emerging tribute orange is also called Emperor Orange.

2. Apples: China is a big producer of apples, accounting for 65% of the total output of apples. Main varieties: Hanfu in southern Liaoning; Gansu Tianshui Huaniu Apple, Shaanxi Luochuan Fuji, Ganxian Red Fuji, Shandong Red Star, Shanxi Wanrong, etc.

3. Banana: Banana has a short stem and a blue-green skin. High temperature ripening, green and yellow skin. When it matures at low temperature, the skin turns from green to yellow with pockmarked spots (that is, "plum blossom spots"). The pulp is soft, yellow-white, sweet, seedless and full of flavor.

4. Mango: Mango is one of the famous tropical fruits. Mango fruit contains sugar, protein and crude fiber. The precursor carotene of vitamin A contained in mango is particularly high, which is rare among all fruits. Secondly, the content of vitamin C is not low. Minerals, protein, fat, sugar, etc. It is also its main nutritional component. Can be used to make fruit juice, jam, canned food, pickled food, hot and sour kimchi, mango milk powder, candied fruit, etc.

5, mangosteen: scientific name Mangji persimmon. When the fruit is ripe, it is purplish red with yellowish brown patches, smooth, with 4-5 seeds, and the aril is juicy and white. Originally from Maluku, it is widely cultivated in tropical areas of Asia and Africa; China, Taiwan Province, Fujian, Guangdong and Yunnan also introduced or tried planting. As a famous tropical fruit, it can be eaten raw or preserved.

References:

Baidu encyclopedia-mango persimmon

Baidu Encyclopedia-Grapefruit (Rutaceae Citrus)

Baidu Encyclopedia-Myrica rubra (Myrica of Myrtaceae)

Baidu encyclopedia-pineapple Baidu encyclopedia-grapes

Baidu encyclopedia-lemon (rutaceae citrus)