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听音频，回答题
There is an effect that not only have we all witnessed， but have26. Haven"t we all been on an elevator and noticed that just about everyone stops talking when they get on？ Why do we do that？ You can be having a 27 pleasant conversation with someone， and as soon as you get on an elevator， you just feel like you"d better shut up.
Then， as soon as the doors open， everyone28conversation. Primatologists， or people who study primate （灵长类动物） behavior， have a term for this. It"s called the "elevator effect，" though it doesn"t 29 only on elevators. It happens whenever a group of primates， like humans， is 30 a situation where escape is 31 impossible. It"s thought to be a kind of safety32: as long as nobody talks， nobody is going to risk getting in a fight when there"s no way to spread out. The elevator effect keeps a lid on potential problems before they start.
Even though they rarely if ever ride elevators， chimpanzees demonstrate the elevator effect as well. When chimps are temporarily crowded together into small areas， they will 33 their vocal communication， that is， nobody speaks， and avoid eye 34. The amount of scratching the chimps do， however， goes up. Since scratching is a sign of stress in chimps， we can imagine what they are feeling. It"s just like what we feel in a crowded elevator——everybody carefully35 the lighted numbers and no one saying a thing.
第（26）题__________
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更多“听音频，回答题 There is an effect that not only have we all witnessed， but have26. Haven"t”相关的问题
第1题
听音频：
回答题
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A.She got up late this morning.
B.She is in bad mood.
C.She iniureed，herself when getting up
D.She is offended by the man"s words.
第2题
听材料，回答题。
What is the relationship between the two speakers？ 查看材料
A.Daughter and father．
B.Friends．
C.Couple．
第3题
听材料，回答题。
Where does the conversation take place？ 查看材料
A.On the phone．
B.In the street．
C.In a restaurant．
第4题
听材料，回答题。
What was the woman planning to do today？ 查看材料
A.Type the letters．
B.Take her son to the show．
C.Do some sports．
第5题
听听力，回答题：
A.choose to he positive．
B.Try our best to overcome．
C.Make some decisive strategies．
D.Get our ambition inspired．
第6题
听材料，回答题。
What does the author do at the airport？ 查看材料
A.Teach airhostesses and help them with problems．
B.Be the pilot．
C.Carry luggage for the passengers．
第7题
听听力，回答题：
A.The picnic they will have on weekend．
B.The forecast for the weather on weekend．
C.The timetable of their plan on weekend．
D.The suggestion for arrangement on weekend．
第8题
听听力，回答题：
A.Its the work combined musical talents with expertise．
B.Its the song published in a collection．
C.Its the masterpiece enjoyed by kids and their parents．
D.Its the achievement made by the teacher．
第10题
听听力，回答题：
A.Common people could meet one another at a sport．
B.People have no intention to have a contest on sports．
C.International sporting contests lead to hatred．
D.Sport creates goodwill between the nations．
第11题
听听力，回答题：
A.Part of the dried, mushrooms have begun to decay．
B.The dried mushrooms didnt arrive on time．
C.Part of the dried mushrooms werent inspected．
D.The dried mushrooms are lost during the shipment．
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