— I hope you'll have a good journey. 

— _____. [ ]

A. Well done

B. Don't mention it

C. Certainly

D. Thank you very much

当投捞器主要捞爪与打捞头或压送头相连接，定向爪、定位滑块臵于定向芯子内，靠（）和外套上、下移动来控制定向爪和定位滑块的收拢和释放。

A、打捞头

B、压送头

C、打捞头和压送头

D、定向芯子