9.Have you ever thought of why dogs are human's best friends?What's the bond(緊密關系) between human and dogs?A new study by Japanese scientist Miho Nagasawa seems to have found the answer,and it has to do with something named the cuddle(擁抱)chemical.
The cuddle chemical has another,more scientific name oxytocin(催產(chǎn)素).Oxytocin is something in the blood that encourages bonding.Levels of oxytocin increase,for example,when a mother feeds her newborn baby.According to Nagasawa's study,levels of oxytocin can also go up when we look deeply into the eyes of a dog.
Humans and dogs have been working together for nearly 30,000years.In order to better understand how the cuddle chemical worked between dogs and humans,Nagasawa and his team did an experiment.They tested levels of oxytocin in dogs and humans,and then put them in a room to interact(交流)with each other.While in the room,the humans pet(撫摸)the dogs,spoke to the dogs,and looked into the dogs eyes.Then the scientists tested their levels of oxytocin again.
The researchers found that levels of oxytocin were higher in both humans and dogs after they interacted.However,levels were the highest in the humans and dogs that simply looked into each others eyes,without touch petting or talking.The longer the humans looked into the eyes of the dogs,the more cuddle chemical was let out.Nagasawa did the same experiment with humans and wolves(狼),but it did not give the same results.
30.The underlined word"it"in Paragraph refers toB.
A.something
B.the answer
C.a(chǎn) new study
D.the cuddle chemical
31.Nagasawa did the experiment of humans and dogs to knowA.
A.how oxytocin worked
B.how oxytocin was divided
C.how they helped each other
D.how they interacted with each other
32.Oxytocin levels reached the highest in the humans and dogsC.
A.if the dogs cuddled the humans
B.when they talked with each other
C.when they looked into each other's eyes
D.if the humans pet the dogs
33.What can we infer(推斷)from the last sentence of the text?D
A.More experiments are expected to help wolves produce oxytocin.
B.The cuddle chemical in human blood protects us against wolves.
C.It makes sense that humans and wolves are naturally best friends.
D.It's generally impossible to have the bond between humans and wolves.
分析 文章大意:這是一篇說明文,短文主要介紹一項新的研究表明人與狗成為最好的朋友是因為與擁抱化合物(催產(chǎn)素)有關.通過實驗發(fā)現(xiàn)人與狗交流后,催產(chǎn)素的水平升高.在人與狼之間做了相同的實驗,但沒有得到相同的結(jié)果.狗是人類最好的朋友.這個實驗揭秘人和狗之間擁有親密關系的原因.
解答 30.答案:B.詞語猜測題.由上句A new study by Japanese scientist Miho Nagasawa seem to have found the answer(日本科學家長澤美穗的一項新研究似乎找到了答案)可知,and it has to do with something named the cuddle(擁抱)chemical應意為"答案與一種叫擁抱化合物的東西有關".it代指的是the answer答案.故選B.
31.答案:A.細節(jié)理解題.由第二段第一行The cuddle chemical has another,more scientific name:oxytocin(擁抱化合物有另外一個更科學的名字--催產(chǎn)素)及第三段第一行In order to better understand how the cuddle chemical worked between dogs and humans,Nagasawa and his team did an experiment.(為了更好地了解狗與人之間的催產(chǎn)素如何起作用,長澤和他的團隊做了一個實驗)可知,做實驗是為了了解狗與人之間的催產(chǎn)素如何起作用.故選A.
32.答案:C.細節(jié)理解題.由第四段第一行However,levels were the highest in the humans and dogs that simply looked into each other's eyes,without much petting or talking.(然而,人與狗僅僅注視,沒有撫摸或說話時催產(chǎn)素水平最高)可知,當人與狗注視時催產(chǎn)素水平最高.故選C.
33.答案:D.推理判斷題.由文章最后一句Nagasawa did the same experiment with humans and wolves(狼),but it did not give the same results.(長澤在人與狼之間做了同樣的實驗,但沒有給出相同的結(jié)果)可知,人與狼之間有緊密關系是不可能的.故選D.
點評 閱讀題型,要注重句子與句子之間、段落與段落之間邏輯關系以及對篇章的整體理解.根據(jù)所給問題選擇正確選項完成試題.