常用电焊条的型号有（）焊条。

A.低碳钢

B.低合金高碳钢

C.钼和铬钼耐热

D.铬和铬镍不锈钢

-How did you like Nick's performance last night?

-To be honest，his singing didn't ________ to me much.[      ]

A．appeal  

B．belong

C．refer  

D．occur