What is the primary purpose of a splint applied in first aid?（）

Which radiotelephone signal indicates receipt of a distress message?（）

To reduce mild fever the MOST useful drug is（）.

Tripping defects in anchors frequently occur in（）.

What are symptom(s) of a ruptured appendix?（）

There is not（）depth of water around the area centered at the lighthouse.

The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.

To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.

To prevent a wooden hull from leaking you caulk it（）.