题目内容
The first important monograph on dietotherapy in China is Sun Simiao's （ ）
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In the 20th century, the most important food invention was hybrid rice, and its inventor was Yuan Longping. （ ）
In China, the first standard to measure food quality is ( )
In the early Paleolithic Age, because of the low population density, primitive humans can enjoy enough resources. So the three ways of food sources are ( )
In the Paleolithic Age, the discovery and use of fire is a very important achievement for primitive people. They learned to use fire through a long process from natural fire to artificial fire. Please rank the development of fire （ ）
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