In the new century, after just over ten years of development, the biggest problem facing the development of China's food industry (dining table engineering) at present and in the future is ( ).
A. national nutrition and health
B. food supply guarantee
C. food abundance guarantee
D. export expansion
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In the last decade, the most important new ideas, new theories and new perspectives on food and the nutrition and health of the human diet by scientists around the world have been ( ).
A. discovering functional food systematically (develop series of health care products, etc.)
B. the relationship between food and intestinal microbial flora metabolism and human health
C. new food processes and technologies
D. a series of bioactive and functional substances in food were systematically developed
According to the theory of single origin of human beings, the main reason that drives human beings to have to migrate on a large scale (worldwide) is（ ）.
A. looking for living food
B. coping with climate change
C. insufficient regional resources
D. ethnic territory struggle
From the origin of human beings to the very long evolutionary process, the most important thing that food ultimately influenced and changed human evolution is ( )
A. with the application of fire, food changes from raw to cooked
B. application of food processing tools, from coarse to fine
C. cooking utensils from simple to rich
D. the emergence of bronzes and the development of smelting technology
Since the spring and autumn period and the warring states period, the most important measures to guarantee the population growth of the Chinese nation several times are ( ).
A. the introduction and large-scale planting of wheat in the Qin and Han Dynasties
B. the introduction and large area planting of corn, sweet potato and potato in Ming and Qing Dynasties
C. advances in farming and multiple cropping techniques, improvement in irrigation capacity and improvement in yield per unit area of new varieties
D. the substantially increasing yield per unit area of the new variety and technical support chemical fertilizers and pesticides
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