Do you want to improve your physics and chemistry grades？Well，maybe you should first learn something about the struggles（斗爭(zhēng)） of great scientists.
   The American Psychological Association（美國(guó)心理學(xué)會(huì)）did a study.More than 400 students in New York City took part in it.The students were divided into three groups.
Group 1 read a typical textbook that describes the achievements of great Scientists.Group 2 read about those scientists personal struggles.For example，as a Jew，Einstein escaped from Nazi Germany to avoid being killed.Group 3 read about the scientists 'intellectual（智力的） struggles，such as Marie Cure's tailed experiments.These stories about struggles also told students how the scientists dealt with these problems.
   The students took a science test before the study.After the six-week study，they took another.Scientists found those in Groups 2 and 3 improved their science grades.Students in Group 1 didn't see a grade increase.Some of them even had lower grades after the study.
   The study was led by Xiaodong Lin Siegler，a professor.According to Xiaodong，kids then think Einstein was born a genius.They believe they will never match him.Many of them fail to realize that any success requires a long journey.Along the way，there are many lures.
Students who read the struggle stories were more likely to say great scientists were like jye.aimselves.The great minds" also had to solve problems to achieve success.
   Xiaodong says today's science textbooks fail to bring science to life.As a result，students hardly consider science as part of their everyday lives.Instead，they just see a long list of facts that they have to remember.Xiaodong thinks textbooks should include more stories about how great scientists had to struggle to succeed.And they should pay more attention to how these scientists responded to the problems they met along the way.

（1）According to the passage，we can improve our physics and chemistry grades by

C

C

.
A．reading the achievements of great scientists more carefully
B．listening more carefully to our physics and chemistry teachers
C．learning about the difficulties that great scientists once experienced
D．spending more time remembering the lists of facts in our science textbooks
（2）Who took part in the study held by the American Psychological Association？

A

A

A．Students who went to schools in New Yolk City.
B．Students who studied in secondary school.
C．Students who were interested in physics and chemistry.
D．Students who were poor at physics and chemistry grades.
（3）According to the last paragraph，Xiaodong thinks that

D

D

.
A．Today's science textbooks bring much science to life
B．Students should study harder to bècome a great scientist
C．Students only need to remember a long list of facts
D．It is meaningful to learn how scientists struggle to succeed.
（4）Where can we probably find this passage？

D

D

A．A novel.
B．A fashion magazine.
C．A story book.
D．An education website.