问题 多选题
一带正电的粒子只在电场力作用下沿x轴正向运动,其电势能Ep随位移x变化的关系如图所示,其中0-x2段是关于直线y=x1的对称曲线,x2-x3段是直线,则下列说法正确的是(   )

A.x1处电场强度为零

B.x2-x3段是匀强电场

C.x1、x2、x3处电势φ1、φ2、φ3的关系为φ1>φ2>φ3

D.粒子在0-x2段做匀变速运动,x2-x3段做匀速直线运动

答案

AB

阅读理解

阅读理解。

     Sandra Cisneros was born in Chicago in 1954 to a Mexican American family. As the only girl in a family

of seven children, she often felt like she had "seven fathers," because her six brothers, as well as her father,

tried to control her. Feeling shy and unimportant, she retreated (躲避) into books. Despite her love of reading,

she did not do well in elementary school because she was too shy to participate.

     In high school, with the encouragement of one particular teacher, Cisneros improved her grades and

worked for the school literary magazine. Her father encouraged her to go to college because he thought it

would be a good way for her to find a husband. Cisneros did attend college, but instead of searching for a

husband, she found a teacher who helped her join the famous graduate writing program at the University of

Iowa. At the university's Writers' Workshop, however, she felt lonely-a Mexican American from a poor

neighborhood among students from wealthy families. The feeling of being so different helped Cisneros find

her "Creative voice."

     "It was not until this moment when I considered myself truly different that my writing acquired a voice.

I knew I was a Mexican woman, but I didn't think it had anything to do with why I felt so much imbalance

in my life, but it had everything to do with it! That's when I decided I would write about something my

classmates couldn't write about."

     Cisneros published her first work, The House on Mango Street, when she was twenty-nine. The book

tells about a young Mexican American girl growing up in a Spanish-speaking area in Chicago, much like the

neighborhoods in which Cisneros lived as a child. The book won an award in 1985 and has been used in

classes from high school through graduate school level. Since then, Cisneros has published several books

of poetry, a children's book, and a short-story collection.

1. Which of the following is TRUE about Cisneros in her childhood? [ ]

A. She had seven brothers.

B. She felt herself a nobody.

C. She was too shy to go to school.

D. She did not have any good teachers.

2. The graduate program gave Cisneros a chance to _____.

[ ]

A. work for a school magazine

B. run away from her family

C. make a lot of friends

D. develop her writing style

3. According to Cisneros, what played the decisive (关键) role in her success? [ ]

A. Her early years in college.

B. Her training in the Workshop.

C. Her feeling of being different.

D. Her childhood experience.

4. What do we learn about The House on Mango Street? [ ]

A. It is quite popular among students.

B. It is the only book ever written by Cisneros.

C. It wasn't success as it was written in Spanish.

D. It won an award when Cisneros was twenty-nine.

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