The strongest of the natural fiber ropes is().
A、Nylon
B、Dacron
C、Manila
D、Sisal
A、Nylon
B、Dacron
C、Manila
D、Sisal
A、tie themselves to the unit so they won't drift with the current B、form a small circular group to create a warmer pocket of water in the center of the circle C、send the strongest swimmer to shore for assistance D、form a raft by lashing their life preservers together
A、the raising of the standards of teaching and the reform in curriculum B、the raising of the standards of teaching and learning and the restructuring of the schools C、the raising of the standards of teaching and the improvement of the standards of learning D、None of the above
A、volume of liquid in the tank B、volume of displacement of the vessel C、location of the tank in the vessel D、height of the center of gravity of the vessel
A、At the head of the tow B、75m from the head of the tow C、120m from the head of the tow D、180m from the head of the tow