17．Do you have a good memory？Maybe you remember better than all of your friends．But even if you have a short-term memory，it's better than a chimpanzee's（黑猩猩），right？Well，you may be wrong．
Tetsuro Matszawa，a scientist from Kyoto University，Japan has showed how chimps have far better memories than humans．"We learn that chimps have great memories by doing tests，"he told The Guardian"You can do things to improve your memory．"
How do chimps have better memories than us？Scientists t ested four chimps and human volunteers．They showed them five numbers on a computer screen．Chimps and human volunteers had to remember the numbers correctly．But to make it hard，the numbers dis appeared after seven tenths of a second．Then they will reduce the time to two tenths of a second．While humans began to make mistak e after mistake，the young chimps still did very well．
Why do they have better memories？We share 98.8 percent of our DNA with chimps．But during evolution（进化），we lost some of our shared abilities．As humans learned new skills，like language，we had to lose some of our memory skills to make room in our brains．"To get something，we had to lose something，"said the scientist．
Chimps need good memories to survive．When a chimp looks up at the big tree and pick a banana，he must remember where he saw it as he fights off competition from other animals．
33．What did the scientist's study find？B
A．Chimps can remember all of their friends．
B．Chimps have better memories than humans．
C．Chimps do things to improve their memories．
D．Chimps can do many things better than humans．
34．Which of the followi ng is TRUE of the test？D
A．Five chimps and human volunteers were tested．
B．The numbers first disappeared after a second．
C．Humans made fewer mistakes than chimps．
D．The chimps did a better job than humans．
35．During evolution，humansC．
A．lost 98.8 percent of their DNA shared with chimps
B．needed very good memories to survive
C．gained skills but also lost skills
D．learned to compete against chimps．
分析 文章介绍了一个实验，研究人员通过实验表明了黑猩猩在记忆方面比人类要强．
解答 B D C
33．B 推理题．根据第二段Japan has showed how chimps have far better memories than humans．"We learn that chimps have great memories by doing tests得知，研究人员的目的是测试黑猩猩的记忆比人类要强，故选B．
34．D 细节题．Scientists t ested four chimps and human volunteers暗示A错误；the numbers dis appeared after seven tenths of a second得出B错；While humans began to make mistak e after mistake，the young chimps still did very well．推出C错误；并且得出选项D正确，即黑猩猩在测试中表现比人类要更好．
35．C 细节题．在文章中To get something，we had to lose something可知，人类获得某个技能的同时又失去了其他技能，故选C．
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
