2, in addition to starch, there are other substances such as protein in flour. In addition the two play different roles. Starch used to thicken the soup can make the soup viscous, but also to make the color brighter, so that the vegetable juice Ba in the role of ingredients more flavorful, can make the meat soft and tender, while the flour does not have this effect.
3, if you use flour, it will turn into a white paste. But when frying flour and starch can be partially replaced, flour fried out thicker and tougher, because it contains gluten, starch is more crispy, generally mixed in proportion to the two. Single flour to fry crispy, to add baking powder made of crispy paste.
4, if you need it urgently, you can use gauze wrapped in flour in the water to wash, the water becomes white is water starch, gauze is protein, water starch can play a role in the purchase of starch, or you can take the potatoes to cut the water to wash, and then let it stand for 10 minutes after the water will be poured out of the bottom of the pot of the rest of the white material can be approximate instead.