问题 计算题

如图所示,在左端封闭右端开口的U形管中用水银柱封一段空气柱L,当空气柱的温度为14℃时,左臂水银柱的长度h1=10cm,右臂水银柱长度h2=7cm,气柱长度L=15cm;将U形管左臂放入100℃水中且状态稳定时,左臂水银柱的长度变为7cm。求出当时的大气压强(单位用cmHg).

答案

75.25cmHg

题目分析:对于封闭的空气柱(设大气压强为P0

初态:;V1=LS=15S(cm)3  T1=287K

末态:,,故压强

 T2=273K

由理想气体的状态方程得:,解得:大气压强P0=75.25cmHg

阅读理解

Danielle Steel,America’s sweetheart,is one of the hardest working women in the book business.Unlike other productive authors who write one book at a time,she can work on up to five.Her research alone before writing takes at least three years.Once she has fully studied her subjects,ready to dive into a book,she can spend twenty hours nonstop at her desk.

Danielle Steel comes from New York and was sent to France for her education.After graduation,she worked in the public relations and advertising industries.Later she started a job as a writer which she was best fit for.Her achievements are unbelievable:390 million copies of books in print,nearly fifty New York Times best-selling novels, and a series of “Max and Martha” picture books for children to help them deal with the real-life problems of death,new hobbies and new schools. Her 1998 book about the death of her son shot to the top of the New York Times best-selling list as soon as it came out.Twenty-eight of her books have been made into films.She is listed in the Guinness Book of World Records for one of her books being the Times best-seller for 381 weeks straight.

Not content with a big house,a loving family,and a view of the Golden Gate Bridge, Danielle Steel considers her readers to be the most important resource(资源) and has kept in touch with them by e-mail.While she is often compared to the heroines(女主人公) of her own invention,her life is undoubtedly much quieter.But,if she does have anything in common with them,it is her strength of will and her inimitable style.There is only one Danielle Steel.

小题1:Danielle Steel is different from other writers in that        .

A.she can write several books at the same time

B.she often does some research before writing a book

C.she is one of the most popular American women writers

D.she can keep writing for quite a long time without a break小题2:Children who have read “Max and Martha” picture books may know        .

A.how to deal with affairs at school

B.what to do if Max and Martha die

C.what to do when new babies are born into their families

D.how to solve the difficult problems in their writing classes小题3:One of Danielle Steel’ achievements is that        .

A.some TV plays were based on her books

B.her picture books attracted a lot of young men

C.one of her books became a best-seller in 1998

D.she wrote the Guinness Book of World Records小题4:We can learn from the passage that Danielle Steel   .

A.lives an exciting life

B.values her readers a lot

C.writes about quiet women

D.is pleased with her achievements小题5:What does the underlined word “inimitable” mean?

A.hardworking

B.attractive

C.strange

D.unique

单项选择题