Грамотическое по . ≡эти слова были выделены курсиром≡ substitute that, those, one, ones for the repeated italicized nouns. 1. the emergence of new technologies, including ≡the technology≡ using radioisotopes, has made it possible to investigate transport of various minerals in the body. 2. people don’t typically consume adequate amounts of milk, especially ≡people≡ over middle age and older ≡people≡. 3. calcium content in older people’s bones is typically lower than ≡calcium content≡ found in bones of younger ≡people≡. 4. percentage of potassium, chloride, and magnesium in milk is much lower than percentage of calcium and phosphorus. 5. such minerals as calcium and phosphorus are known to be the most important ≡minerals≡ for skeleton growth. 6. milk is food both for the old people and the young ≡people≡. 7. man puts in a lot of effort in manufacture of food both tasty and good for health. such ≡food≡ as milk, however, is provided by nature itself.