阿华同学用如图所示的实验装置来测定物体与滑板间的滑动摩擦力.下列关于用这种装置做

题型:选择题

问题:

阿华同学用如图所示的实验装置来测定物体与滑板间的滑动摩擦力.下列关于用这种装置做实验的说法中,你认为正确的是(  )

A.必须调节托盘中重物的重量,确保滑板做匀速运动

B.不一定要使滑板做匀速运动,但必须要用恒力拉滑板

C.托盘中放的重物越重,滑板运动得越快,弹簧秤读数越大

D.用该装置做实验,只要沿滑板方向拉动滑板,无论滑板做匀速、匀变速、还是非匀变速运动,弹簧秤的读数都相同

考点:滑动摩擦力、动摩擦因数
题型:选择题

立杆时,应设专人统一指挥,严禁坑内有人工作,除指挥人员及指定人员外,其他人员必须在()杆高的距离以外。

A.0.5倍

B.1.2倍

C.8倍

D.10倍

题型:选择题

已知四边形ABCD中,∠A=∠B=∠C=90°,若添加一个条件即可判定该四边形是正方形,那么这个条件可以是(    )。

题型:选择题

()的患者在遭受急剧、严重的精神打击后,在数分钟或数小时内发病,病程为数小时至数天。

A.慢性应激障碍

B.创伤后应激障碍

C.神经应激障碍

D.急性应激障碍

题型:选择题

已知梯形的上底是4米,下底是6.5米,高是1.5米。求梯形的面积。

题型:选择题

阅读理解。

     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 compared 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 attention,

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.

1. 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

2. Which of the following is true of Rae Armantrout?

A. She published a poetry textbook.            

B. She used to teach Denise Levertov.

C. She started a poets' group with others.        

D. She taught creative writing at UC Berkeley.

3. What can we learn about "Versed"?

A. It consists of three parts.                  

B. It is mainly about the American army.

C. It is a book published two decades ago.      

D. It partly concerns the poet's own life.

4. Rae Armantrout's colleagues think that she ____________.

A. should write more        

B. has a sweet voice

C. deserves the prize        

D. is a strange professor

5. What can we learn from the text?

A. About 2,700 copies of "Versed" will be printed.    

B. Cancer made Armantrout stop writing.

C. Armantrout got her degrees at UCSD.            

D. "Versed" has been awarded twice.

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