_stands for the world health organization.()
A. WTO
B. WHO
C. AIDS
D. UN
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伯努利方程式质量守恒定律在流体力学中的一种表达方式()
Health is the greatest wealth.()
Which of the following words can best describes the relationship between human and nature in Chinese culture()
A. friendly
B. kind
C. harmonious
D. obedient