单选题When you are firing a pyrotechnic distress signal，it should be aimed（）.A horizontally and directly abeam of your vesselB at the vessel whose attention you want to attractC into the windD at greater than 60 degrees above the horizon

You are preparing to take another vessel in tow．Which signal indicates，Hawser is made fast ______．

A.Firing of a green star signal

B.Firing of a red star signal

C.An orange smoke signal

D.Three white star rockets at 1-minute intervals

If you are on the beach and are signaling to a small boat in distress that your present location is dangerous and they should land to the left，you would ______．

A.fire a green star to the left

B.send the letter K by light and point to the left

C.place an orange signal to your left as you signal with a white light

D.send the code signal S followed by L

When using a hand held smoke signal from a lifeboat, you should activate the signal _____.

A.on the downwind side

B.on the upwind side

C.inside the boat

D.at the stern

Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when ______．

A.vessels nearer the distress vessel acknowledge receipt

B.vessels nearer the distress vessel fail to acknowledge receipt

C.even you have not received the distress

D.even the vessel in distress expressly prohibit you from providing any salvage service

A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the ______.

A.distress position

B.spoken words “Mayday, Mayday, Mayday”

C.ship’s name

D.ship’s call letters

If you go into the forests with friends，stay with them． If you don't，you may get lost．If you do get lost，this is what you should do．

Sit down and stay where you are．'Don't try to find your friends． Let them find you． You can help them to find you by staying in one place．

There is another way to help your friends or other people to find you． Give them a signal (信号) by shouting or whistling(吹口哨) three times． Stop． Then shout or whistle three times again． Any signal given three times is a call for help．

Keep on shouting or whistling，always three times'together． When people hear you，they will give two shouts or two whistles． When a signal is given twice，it is an answer to a call for help．lf you don-t think that you will get help before night comes，try to make a small room with branches(树枝)．

What should you do if you get hungry or need to drink water? You would have to leave your little branch room to look for something to eat and drink． Don't just walk away． Drop small branches as you walk so that you can find your way back．

The most important thing to do when you are lost-stay in one place．

( )16． If you get lost in the forests，you should walk everywhere to find your friends as soon as possible．