Conversation One
Listen to the conversation, mark each statement as either True (T) or False (F) according to your listening.
Crocodiles can now be found in southern Florida.
T
对话开头女士提到佛罗里达南部有鳄鱼后， 男士质疑到， 在科学课上曾学过那没有鳄鱼。 女士随后解释现在不一样了， 她在一个有关鳄鱼的科学杂志上看到的。 故该说法正确。
The American crocodiles are more susceptible to cold than American alligators.
T
对话中女士说到如果美洲鳄鱼比美洲短吻鳄更不怕冷的话， 全佛罗里达都会有美洲鳄鱼了。 而上文女士说佛罗里达南部有美洲鳄鱼了。 可知美洲鳄鱼比短吻鳄更怕冷， 所以只在南部活动。 故该说法正确。
There is something like a king among a group of crocodiles.
F
对话中男士问女士鳄鱼中是否有领导者， 类似于鳄鱼王那样的存在， 女士解释后归纳到“there is no such thing like the king of crocodiles.”可知该说法错误。
The number of crocodiles in a group could be more than 30.
F
对话中男士问女士一个族群里有多少条鳄鱼， 女士回答到“Usually about 10 or more, but less than 30.”表明有10到30条， 可知该说法错误。
Vocalization is a sort of alert crocodiles use to protect their territory.
T
【听力原文】
W: Do you know there are crocodiles in the south of Florida? That‟s amazing, right?
M: Really? But I remember that there were no crocodiles in this area, which I once learned in my science class! How could it be!
W: You know, things have changed. I‟ve just read it from a science journal about crocodiles. It says the American crocodiles would be seen all over Florida if they are less susceptible to cold than American alligators.
M: Do you mean they are afraid of cold? But they live in water.
W: To some extent, it‟s a true scientific fact.
M: You know, I‟ve been wondering about the saltwater crocodiles since our last science class.
W: Talk to me. I‟m kind of expert about crocodiles.
M: OK ... Is there a leader of something, like a crocodile king among them?
W: Interesting. Saltwater crocodiles live in loosely organized social groups. And they are also territorial with the best territory being held by the strongest male. However, territory is usually kept through posture and vocalizations and not violence. But, in my opinion, there is no such thing like the king of crocodiles.
M: I see. But they did live in a group, so how many of them there are in a group?
W: Usually about 10 or more, but less than 30.
M: Wow, I definitely will pass out if I see a group of them.
【解析】对话中女士提到“However, territory is usually kept through posture and vocalizations and not violence.”表示鳄鱼通常通过架势和发声， 而不是暴力来保护领地。 故发声是保护领地的方法之一， 可知该说法正确。