苍蝇的平衡棒原理被应用于运载火箭的研制中，这在生物多样性的价值中能体现出[ ]

A．潜在价值

B．科研价值

C．间接价值

D．生态价值

口语应答

小题1:What’s this?                     A. I’m fine, thank you.

小题2:Good evening!                     B. B-O-O-K.

小题3:How are you?                      C. It’s 023-66226754.

小题4:Good bye!                         D. Hello.

小题5:What’s his name?                 E. It’s an apple.

小题6:Hello.                            F. Good evening.

小题7:What’s her phone number?          G. His name’s Jim.

小题8:Nice to meet you!                 H. It’s green.

小题9:Spell it, please.                  I. Bye—bye.

小题10:What color is it?                 J. Nice to meet you, too.