Lily is one of the puipls who is studying in Dongshan        1.       

Primary School. One day，in her way to school，Lily found      2.      

a wallet lay on the road. She picked it up and found a lot of       3.      

money and a calling card in them. She thought the loser must     4.      

be worried. Without the wallet，she went to a public telephone    5.       

and called on the owner. Then she waited at the bus-stop. The owner  6.      

came by taxi in a moment. Lily gave the wallet to her. The owner   7.       

was very thankful that she took out a 100-yuan note to rewardLily.  8.      

And she refused it and went to school. Seeing this , the ownerraised 9.     

her thumb and praised Lily helping her in time again and again .    10.   

骶骨是由几块椎骨组成（）

A.3块

B.4块

C.5块

D.6块

E.4节退化椎骨融合成1块