完成对话。

A:  Could you come and __1__ me, please?

B:  OK,I'm coming. What's wrong?

A:  I want __2__ do my homework here. But there is a big box __3__ my desk. Could you help me get it

     down?

B:  Certainly. Oh, dear! It's very heavy. What's in it?

A:  There're some bottles in it, I __4__  . 

B:  Is there __5__ food to eat?

A:  Let's open it and see. 

B:  Ah! It's full of bottles of orange.

该脊髓损害为

A．脊髓半切综合征

B．脊髓横贯性损害

C．脊髓后角损害

D．脊神经根损害

E．脊髓后索和侧索联合损害