–How about going to the Disneyland together?

–       

A. Enjoy yourself!         

B. Good luck!              

C. Sounds like a good idea!

E4315、E5015属于（）种药皮类型的焊条。

A.钛钙型

B.钛铁矿型

C.铁氢钠型

D.低氢钾型