问题 选择题
如图所示,AB是一质量为m的均匀细直杆,A端靠在光滑的竖直墙壁上,B端置于水平地面上,杆身与竖直方向夹角为θ,杆与地面的摩擦系数为μ,保持平衡,则此时杆与地面的摩擦力为(  )

A.mgtgθ

B.mgsinθ

C.μmg

D.μmg

答案

答案:A

阅读理解

One afternoon I toured an art museum while waiting for my husband to finish a business meeting.I was looking forward to a quiet view of the art works.

A young couple viewing the paintings ahead of me chatted nonstop between themselves.I watched them a moment and decided the wife was doing all the talk.I admired the husband’s patience for putting up with her continuous talk.Distracted by their noise,I moved on.

I met with them several times as I moved through the different rooms of art.Each time I heard her constant burst of words,I moved away quickly.

I was standing at the counter of the museum gift shop making a purchase when the couple came near to the exit.Before they left,the man reached into his pocket and pulled out a white object.He extended it into a long stick and then tapped his way into the coatroom to get his wife’s jacket.

“He’s a brave man.”The clerk at the counter said,”Most of us would give up if wewere blinded at such a young age.During his recovery he made a promise that his life wouldn’t change.So ,as before,he and his wife come in whenever there’s a new art show.”

“But what dose he get out of the art?”I asked,“He can’t see.”

“Can’t see?You’re wrong.He sees a lot.More than you or I do.”The clerk said,“His wife describes each painting so he can see it in his head.”

I learned something about patience,courage and love that day.I saw the patience of a young wife describing paintings to a person without sight and the courage of a husband who would not allow blindness to change his life.And I saw the love shared by two people as I watched this couple walk away hand in hand.

小题1:The young couple were at an art museum ________.

A.to show their love

B.to appreciate art

C.to discuss paintings

D.to describe paintings小题2:“…I moved away quickly.”in Paragraph 3 shows that the writer ________.

A.was in the hope of visiting more rooms

B.was in a hurry to buy some gifts

C.was tired of the nonstop talking

D.was not interested in the art show小题3:We can infer from the passage that the husband _________.

A.was not born blind

B.couldn’t stand his wife

C.knew nothing about art

D.completely depended on his wife小题4:After hearing what the clerk had said about the couple,the writer was ________.

A.encouraged

B.excited

C.touched

D.annoyed小题5:The passage is mainly about ___________.

A.the importance of art

B.good manners in public

C.patience of a husband

D.love between a couple

填空题