The safety stopper that prevents the anchor cable from running free if the cable jumps the
A.riding pawl
B.devil's claw
C.buckler plate
D.spill pipe
A.riding pawl
B.devil's claw
C.buckler plate
D.spill pipe
The riding pawl is ______.
A.a safety interlock in a cargo winch that prevents the runner from overspeeding
B.a stopper that prevents the anchor cable from running free if the cable jumps the wildcat
C.the device that locks the deck lashings of the Peck and Hale system
D.the lug that rides on the eccentric rib and engages the locking ring on the windlass
B: Yes, Professor Smith. We did.
S: Who's your lab partner, Bob?
B: Anne Wilson.
S: Well, Anne, can you and Bob go over the procedure for the class?
A: Sure. Firs(we put ten grams of crushed limestone in a bottle.
S: Anything special about the bottle?
B: It was a gas - collecting bottle with a one - hole stopper and bent glass tubing.
S: Very good. So you put the limestone in a gas - collecting bottle. Then what?
A: Then we poured in ten milligrams of hydrochloric acid, put on the stopper, and collected a bottle of carbon dioxide.
S: Right, What was the method of collection?
A: Water displacement.
S: Good.
A: Then, we lit a magnesium ribbon and put it in the bottle or carbon dioxide.
B: And carbon deposits began to form. on the bottom of the bottle, You see, we didn't have any problem with procedure.
A: Well, we had a little problem getting the magnesium ribbon to stay lit until we could get it into the bottle.
B: Okay. But we did it. The big problem was that we really didn't understand what happened. Did the magnesium combine with the oxygen in the carbon dioxide?
S: You have just answered your own question, Bob. The burning magnesium broke the carbon - oxygen bonds in the carbon dioxide, and then the oxygen combined with the magnesium to produce magnesium oxide.
A: And the carbon was freed to deposit itself on the bottle.
S: Exactly.
(23)
A.To discuss the results of the lab experiment.
B.To answer Bob' s question about the lab experiment.
C.To explain the method of collection by water displacement.
D.To prepare the students to do the lab experiment.
B: Yes, Professor Smith. We did.
S: Who's your lab partner, Bob?
B: Anne Wilson.
S: Well, Anne, can you and Bob go over the procedure for the class?
A: Sure. First we put ten grams of crushed limestone in a bottle.
S: Anything special about the bottle?
B: It was a gas-collecting bottle with a one-hole stopper and bent glass tubing.
S: Very good. So you put the limestone in a gas-collecting bottle. Then what?
A: Then we poured in ten milligrams of hydrochloric acid, put on the stopper, and collected a bottle of carbon dioxide.
S: Right, what was the method of collection?A: Water displacement.
S: Good.
A: Then, we lit a magnesium ribbon and put it in the bottle of carbon dioxide.
B: And carbon deposits began to form. on the bottom of the bottle, you see, we didn't have any problem with procedure...
A:WeI1, we had a little problem getting the magnesium ribbon to stay lit until we could get it into the bottle.
B: Okay. But we did it. The big problem was that we really didn't understand what happened. Did the magnesium combine with the oxygen in the carbon dioxide?
S: You have just answered your own question, Rob. The burning magnesium broke the carbon -oxygen bonds in the carbon dioxide, and then the oxygen combined with the magnesium to produce magnesium oxide.
A: And the carbon was freed to deposit itself on the bottle.
S: Exactly.
What is the purpose of this class discussion?
A.To discuss the results of the lab experiment.
B.To answer Bob's question about the lab experiment.
C.To explain the method of collection by water displacement.
D.To prepare the students to do the lab experiment.
Don' t be anxious ______her safety, She' be OK.
A.for
B.about
C.with
D.at
A、Manage Safety Decides Safety
B、Manage Safety Doesn't Stop
C、Material Safety Designated Sheet
D、Material Safety Data Sheet
A.Y
B.N
C.NG
Which of the following mustn't you do in order to seek lightning safety?
A.Hide in a building.
B.Sit in a ear.
C.Bend low to the ground.
D.Lie under a tall tree.
Which of the following is NOT among the "improper ways" mentioned in the passage?().
A.They don't know where best to place the child.
B.They don't have the safety equipment for the child.
C.They don't use the proper restraint for the kid's age and weight.
D.They don't install the safety seats properly.
A、Safety information shouldn’t be repeated even if it is really important for the readers.
B、The same safety comment can appear in each page if it is really important for the readers.
C、Don’t repeat the same safety information in each step because readers will stop paying attention to it.
D、It is a better idea to put safety information wherever the readers are likely to see it.
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