问题 选择题

如图所示,有一光投射到放在空气中的平行玻璃砖的第Ⅰ表面,下面说法中正确的是(    )

A.如果在第Ⅰ界面上入射角大于临界角,光将不会进入玻璃砖

B.光从第Ⅱ界面射出时出射光线可能与最初的入射光线不平行

C.光进入第Ⅰ界面后可能不从第Ⅱ界面射出

D.不论光从什么角度入射,都能从第Ⅱ界面射出

答案

答案:D

发生全反射的条件之一是光由光密介质进入光疏介质,A错;由光路图可判断光从第Ⅱ界面射出时出射光线可能与最初的入射光线平行,B错;光进入第一界面后,在界面二的入射角肯定不能达到全反射的临界角,所以肯定从界面二射出,C错;D对。

阅读理解

Emma Hart Willard (1787—1870) was an American pioneer educator. In her time, colleges and universities were open only to men, and women were not permitted to attend.

Emma received advanced education at home from her father and became a school teacher at twenty. She continued to teach at school for several years after her marriage. Then began offer college lessons in her home to women students. Later she founded a school in New York State, which was the first school that offered higher education in the US for women.

Emma Willard also tried to persuade New York State to pass a law to allow women to attend public colleges and universities, though that did not come about until after her death. Some years later people remembered her for her life-long efforts and elected her to the US Hall of Fame (荣誉) in 1905.

小题1:Emma received advanced education at home because _________.

A.universities were only for men at that time

B.her father did not trust the schools

C.her family was poor when she was young

D.she was too shy to go to a public college小题2:Which of the following is TRUE according to the passage?

A.She managed to persuade her state to pass a law allowing women to go to universties.

B.She went on with her teaching after she got married.

C.She received advanced education by teaching herself.

D.She was elected to work in the US Hall of Fame.小题3:What do you suppose the US Hall of Fame is?

A.It is a grand hall where honoured people receive prizes from the government.

B.It is a place where honoured people in the US are buried.

C.It is a building set up in memory of great American people.

D.It is a house of representatives to which respected people are elected.小题4:Why was Emma Willard considered an important person?

A.She was the first woman to get college education.

B.She fought for equal rights for women in the US.

C.She was the first American woman to become a college teacher.

D.She was a pioneer in winning higher education for women in the US.

选择题