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

改错题

第三部分 写作(共两节, 满分50分)

第二节:短文改错(共10小题,每题1.5分,满分15分)

此题要求改正所给段文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画出一个勾(√ );如有错误(每行只有一个错误),则按下列情况改正:

该行多一个词:把多余的词用斜线划掉,在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词;在缺词处加一个漏字符号(^ ),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词

My father woke me up one morning when I was 14, announced,         66.      

“Get up.You are going with me to cut grass.” I felt proudly and       67.            

excited because my father thought he was responsible enough            68.            

to help him in his business.Still, that first day is very hard.         69.            

Towards the evening, my father found some leaves I had               70.            

missed cutting and pulled me aside.“Cut that section again or         71.            

don’t make me tell you do it again.” The message was clear.          72.            

Today I stress the important of doing a job right the first time.        73.            

In every job I have held, I have learned something that helps me on          74.            

my next job.If you work hard, you can learn from any job you do.         75.            

单项选择题 A1/A2型题