Question

10．Can you smell two things at once？This experiment comes from the research of two scientists from Rice University．Denise Chen and Wen Zhou have been experimenting with the science of smell，and have made some very interesting discoveries．
      To explore that，you will need two things with strong characteristic smells and，of course，your nose．The idea is to smell a different smell with each nostril （鼻孔）．Hold one smell ver y close to your right nostril，and the other smell very close to your left nostril．Then breathe in and pay close attention to what you smell．
      What you should find is that one smell will be very strong．After another sniff （嗅） or two，the first smell will go away，and you will smell the other smell．Keep sniffing，and the first smell will come back．Instead of smelling the two smells evenly （均匀地） mixed，they will work in turns，one after the other．
      Why？Chen and Zhou found that your sense of smell acts much like your sense of sight．Hold a book in front of your nose，so that your left eye sees things on the left side of the book，and your right eye sees things on the right side of the book．You will find that your sight works in turns，first on the left side of the book and then on the right side．Notice that you can't focus your left eye on one object while focusing your right eye on another object．Your brain jumps back and forth （来回地），paying attention to one and then the other．The same thing happens with your nostrils．If they are smelling different smells，your brain pays attention to one and then the other．
12．Which of the following is TRUE about the experiment？C

13．Denise Chen and Wen Zhou discovered thatA．
A．our brain focuses on one thing at a time
B．our two nostrils act differently towards the same smell
C．our nose prefers to smell stronger smells   
D．our sense of smell is connected with our sense of sight
14．The last paragraph is developed byB．
A．giving examples  
B．making a comparison   
C．telling a story    
D．showing the results
15．The main purpose of the text is toB．
A．report an important event          
B．describe a scientific experiment 
C．study how the sense of sight works   
D．introduce two scientists from Rice University．

Answer 1

分析 文章主要是介绍两个科学家所做的一个与鼻子有关的实验．

解答 CABB
12  C 推理判断题．  根据文章第二 段 Hold one smell very close to your right nostril，and the other smell very close to your left nostril．可知把一种气味尽量靠近右边的鼻子，另外一个气味靠近左边的鼻子，故选C．
13  A 细节题． 根据文章最后一段The same thing happens with your nostrils．If they are smelling different smells，your brain pays attention to one and then the other．可知他们两人发现，当一个人用两个鼻孔同时去闻不同的味道时，他的大脑只能让他一次专注到一种味道上，故选A．
14  B 推理判断题．  根据文章最后一段The same thing happens with your nostrils．If they are smelling different smells，your brain pays attention to one and then the other．可知通过眼睛视物和鼻孔闻物的对比来说明人的大脑只能让他一次专注到一个事物上，故选B．
15  B主旨大意题．  通读全文可知文章主要是介绍两个科学家所做的一个与鼻子有关的实验．

点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．