生物多样性包括物种多样性、_1多样性和生态系统多样性三个方面．生物体在表现为多样性的同时也具有共性，在这些共性中，_2是生物最基本的特性．

题干

生物多样性包括物种多样性、____多样性和生态系统多样性三个方面．生物体在表现为多样性的同时也具有共性，在这些共性中，____是生物最基本的特性．

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Picture	Description(描述)
____.	A. They're very smart. People kill them for their ivory.
____	B. Do you often watch him play basketball? If you do so, what do you think of him?
____	C. —I can't find my keys. —Let me help you.
____	D. It's good exercise and also it's good for our environment (环境).
____	E. I always get up at 6 o'clock in the morning.
	F．It means that you can't take photos.