单项选择题

The best title for this passage might be________.

A．Chinese Cooking Style
B．Differences between Proteins
C．How to Take Proteins Scientifically
D．How to Avoid Heart Disease
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单项选择题
According to the first paragraph, gelatin________.
A．is a protein that can be obtained from animals
B．is harmful to human bodies
C．should not be made into a dessert
D．is lacking in tryptophan and arginine
单项选择题
________is a healthy way of eating food.
A．To have more meat and fish than vegetables
B．To take Chinese rice
C．To eat more vegetables and bean curd than meat
D．To eat half a pound of meat for each meal
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