在最坏情况下,冒泡排序所需要的比较次数为A) n/2 B) (n+1)/2 C) n

题型:单项选择题

问题:

在最坏情况下,冒泡排序所需要的比较次数为

A) n/2
B) (n+1)/2
C) n(n-1)/2
D) n(n+1)/2

考点:计算机等级考试C++二级C++笔试
题型:单项选择题

右侧额叶侧视中枢破坏性病变产生()

A.不能上视

B.不能注视右侧

C.双眼凝视左侧

D.双眼凝视右侧

E.出现复视

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There was a story many years ago of a school teacher--- Mrs. Thompson. She told the children on the first day that she loved them all the same. But that was a lie. There in the front row was a little boy named Teddy Stoddard. He didn’t play well with the other children and he always needed a bath. She did not like him.
Then Mrs. Thompson got to know that Teddy was actually a very good boy before the death of his mother. Mrs. Thompson was ashamed of herself. She felt even worse when, like all her other students, Teddy brought her a Christmas present too. It was his mother’s perfume(香水)。
Teddy said, “Mrs. Thompson, today you smell just like my Mom used to.” After the children left she cried for at least an hour. On that very day, she stopped teaching reading, writing and math. Instead, she began to teach children.
Mrs. Thompson paid particular attention to Teddy. The boy’s mind seemed to come alive. The more she encourage him, the faster he improved. By the end of the sixth grade, Teddy had become one of the smartest children in the class.
Six years went by before she got a note from Teddy. He wrote that he had finished high school, third in his class, and she was still the best teacher he ever had in his whole lift. He went to college. Mrs. Thompson got two more letters from him with the last one signed, Theodore F. Stoddard, M. D.(医学博士).
The story doesn’t end there. On his wedding day, Dr. Stoddard whispered in Mrs. Thompson’s ear, “Thank you, Mrs. Thompson, for believing in me. You made me feel important and showed me that I could make a difference.”
Mrs. Thompson, with tears in her eyes, whispered back, “Teddy, you have it all wrong. You were the one who taught me that I could make a difference. I didn’t know how to teach until I met you.”
小题1:What did Mrs. Thompson do on the first day of school?
A.She made Teddy feel ashamed.B.She asked the children to play with Teddy.
C.She changed Teddy’s seat to the front row.
D.She told the class something untrue about herself.
小题2:What did Mrs. Thompson find out about Teddy?
A.He often told lies.B.He was good at math.
C.He needed motherly care.D.He enjoyed playing with others.
小题3:In what way did Mrs. Thompson change?
A.She taught fewer school subjects.B.She became stricter with her students.
C.She no longer liked her job as a teacher.D.She cared more about educating students.
小题4:Why did Teddy thank Mrs. Thompson at his wedding?
A.She had kept in touch with him.B.She had given him encouragement.
C.She had sent him Christmas presents.D.She had taught him how to judge people.
题型:单项选择题

关于弹力和摩擦力的关系,下列说法正确的是(  )

A.若两物体间有弹力,则一定有摩擦力

B.若两物体间有摩擦力,则一定有弹力

C.静摩擦力一定发生在静止的两个物体之间

D.滑动摩擦力一定发生在运动的两个物体之间

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凡遇有()的现场,都应当成立由地方党政领导亲自挂帅的灭火救援总指挥部。

A、燃烧面积大

B、参战力量多

C、灭火救援时间长

D、情况复杂

E、伤亡重大、损失巨大

题型:单项选择题

在司钻法循环中,应保持流体密度均匀的一侧地面压力()。

A、不变

B、变化

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