--How much ________ this pair of trousers? - Ten dollars _______ enough.

A．are, is

B．is, are

C．are, are

D．is, is

脓性指头炎病人，拟行切开引流。何种切口愈合后会影响指端的感觉

A．患指末节掌面的中央直切口
B．患指侧面跨关节切口
C．患指两侧面对口引流
D．患指鱼嘴样切口