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单项选择题

The passage is mainly about ______.

A．the importance of diet
B．the need of iron
C．adolescents' eating habits
D．blood hemoglobin

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单项选择题The author says that the appropriate way to lose weight is to ______.

A．cut out highly processed foods and drinks
B．eat a variety of fresh or very lightly processed foods
C．eat vegetables and eggs
D．eat foods recommended by a physician

单项选择题When the author says that we should intensify our efforts in nutrition education among our young people, he means that we should ______.

A．force young people to eat well-balanced meals
B．tell young people to eat liver , chicken, beef ,or veal
C．teach adolescents about nutrition in home economics class
D．try to change eating habits to get enough iron and other essential nutrients