问题 解答题

某市移动通讯公司开设了两种通讯业务:“全球通”使用者先缴50元月基础费,然后每通话1min,再付0.4元;“神州行”不缴月基础费,每通话1min,付话费0.6元(这里均指市内通话).若一个月内通话时间为x min,两种通讯方式的费用分别为y1元和y2元.

(1)写出y1,y2与x的关系式;

(2)一个月通话为多少分钟时,两种通讯方式的费用相同?

答案

(1)根据题意,y1=0.4x+50,

y2=0.6x;

(2)当y1=y2时,0.4x+50=0.6x,

解得x=250,

即当通话时间为250min时,两种通讯方式的费用相同.

单项选择题

B

Rae Armantrout, who has been a poetry professor at the University of California San Diego (UCSD) for two decades, has won the 2010 Pulitzer Prize in the poetry category for her most recent book, "Versed".

"I’m delighted and amazed at how much media recognition that the Pulitzer brings, as com-pared to even the National Book Critics Award, which I was also surprised and delighted to win," said Armantrout.

"For a long time, my writing has been just below the media radar, and to have this kind of at-tention, suddenly, with my 10th book, is really surprising. "

Armantrout, a native Californian, received her bachelor’s degree at UC Berkeley, where she studied with noted poet Denise Levertov, and her master’s in creative writing from San Francisco State University. She is a founding member of Language Poets, a group in American poetry that analyzes the way language is used and raises questions to make the reader think.

In March, she won the National Book Critics Circle Award for "Versed".

"This book has gotten more attention," Armantrout said, "but I don’t feel as if it’s better. "

The first half of "Versed" focuses on the dark forces taking hold of the United States as it fought the war against Iraq. The second half looks at the dark forces casting a shadow over her own life after Armantrout was diagnosed with cancer in 2006.Armantrout was shocked to learn she had won the Pulitzer but many of her colleagues were not. "Rae Armantrout is a unique voice in American poetry," said Seth Lerer, head of Arts and Humanities at UCSD.

"Versed", published by the Wesleyan University Press, did appear in a larger printing than her earlier works, which is about 2,700 copies. The new edition is scheduled to appear in May.

 

According to Rae Armantrout,().

A.her 10th book is much better

B.her winning the Pulitzer is unexpected

C.the media is surprised at her works

D.she likes being recognized by her readers

单项选择题