P2P经营模式的英文原文是?()
A.People to People
B.Peer to Peer
C.People to Peer
D.Peer to People
参考答案:B
1400×5的积的末尾有[ ]
A.2个0
B.3个0
C.4个0
鱼类的脑神经11对,脊髓在每1体节发出1对脊神经。( )