Vessel（）still to bunker 50 tons of fresh water.

When is the density of the water required to be logged in the logbook of a ship?

A.Any time the vessel moves from water of one density into waters of a different density

B.Prior to getting underway when the vessel is floating in fresh or brackish water

C.Only when the vessel moves from fresh water into salt water

D.The density of the water is not required to be logged in the unofficial logbook

Please supply us with 250 tons of fresh water．You are requested to deliver it on board ______．

A.Till Friday

B.On Friday at the latest

C.Until Friday afterwards

D.At Friday soonest

B

The world is not only hungry，it is also thirsty for water． this may seem strange to you，since nearly 75% of the earth is covered with water． But about 97% of this water is sea water．Man can only drink and use the other 3% fresh water that comes from rivers，lakes，under-ground and other places． And we cannot even use all of that，because some of this fresh water has been made dirty．

At the moment，this small amount(数量) of fresh water is still enough for us． However，our need for water is getting greater and greater． Only if we take steps to solve this problem now，we can get away from a serious world water shortage later on． The people of the world cannot have an enjoyable life without enough clean water．

On one hand we should stop wasting this little water of ours，on the other hand we should find ways to reuse it，but this has not been done widely．

Today，in most large cities，water is used only once and it then returns to the sea or runs into underground places．lf we can make it clean again，it can be used once more just as if it were fresh from a spring．

But even if large cities reuse its water，we still would not have enough in the future． Where．could we turn to next for water? To the ocean! How can we do to make use of this great a-mount of sea water? We can take the salt from the water to make it fresh．

So if we take all these steps，we'll be in no danger of drying up!

( )26． Why does the writer say that the world is thirsty for water?

A． The amount of fresh water is really very small．

B． The people of the world waste too much water．

C． The people of the world have to drink a lot of water every day．

D． There are too many people in the world needing water．

I AM MAKING WATER means ______.

A.My vessel is leaking

B.My vessel is producing fresh water

C.My vessel is producing sea water

D.Sea water is de-salted on board my vessel

Please supply 200 tons of fresh water ______ my ship．

A.with

B.in

C.to

D.on

Approaching a anchorage in fog, you hear one short, one prolonged, and one short blast in that sequence on a ship’s whistle. This indicates ______.

A.A vessel towed

B.A vessel not under command and unable to maneuver.

C.A vessel anchored giving warning of her position.

D.A vessel stopped dead in the water.

A.forbidden

B.flesh

C.given

D.fresh