多项选择题

创业机会的特点：（）
A、具有吸引力
B、持久性
C、适时性
D、可识别

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新陈代谢

答案：是机体与周围环境进行物质交换以及体内的物质和能量的转换过程。它包括同化作用和异化作用。

单项选择题

The Chinese government plans to put environmental concerns into national and local economic development planning is based on its confidence and strong commitment to the concept of sustainable development. （） A. They usually eat more while watching TV. B. They burn off fewer calories. C. They change their diet while watching TV. D. They usually eat more while watching TV and they burn off fewer calories.