【正确答案】正确答案： Varieties of Milk Supermarkets now stock many different varieties of milk. / The most common is still cow's milk, / but others include sheep and goat's milk, as well as a number of plant-based substitutes. / Milk is generally distinguishable by its fat content. / Whole milk is relatively high in fat / and certainly semi-skimmed and skimmed milk can be labelled as low-fat food. / Contrary to popular belief, lowering the fat content in milk does not affect the calcium content, / so an adequate calcium intake can still be obtained from lower-fat dairy products. / However, low-fat milk contains less energy and lower amounts of fat-soluble vitamins / and isn't suitable for children under two years. /