用手握住一个重5N的啤酒瓶,瓶口向上静止在手中,此时手对瓶有一个向上的摩擦力(静

题型:填空题

问题:

用手握住一个重5N的啤酒瓶,瓶口向上静止在手中,此时手对瓶有一个向上的摩擦力(静摩擦力),已知手对瓶的压力为8N,则手对瓶的摩擦力f1=       N;当手对瓶的压力增大到10N时,手对瓶的摩擦力f2        f1(填“>”、“=”或“<”),当往瓶中倒入一定水时,瓶仍静止在手中,手对瓶的摩擦力f3      f1(填“>”、“=”或“<”).

考点:二力平衡的定义及条件
题型:填空题

照下面的例句,以“你渴望理解吗?”或“你希望成材吗?”作开头写一句话。

例句:你热爱生命吗?那么别浪费时间,因为时间是组成生命的材料。

                                                                                   

题型:填空题

下列各句没有语病的一项是[ ]

A.“经过我国资本市场近20年的发展,所取得的成就是有目共睹的,对此我高度评价。”知名经济学家、燕京华侨大学校长华生教授日前在接受《证券日报》记者专访时如是说。

B.科学发展观活动专题辅导报告会是高新区推动两委机关干部深入掌握和理解科学发展观的开班动员会。

C.江苏省9月22日在德国杜塞尔多夫市开展“中国江苏沿海发展经贸合作洽谈会”,推介江苏沿海开发新战略,邀请欧洲大型企业携手共同开发。

D.初步测算,我国2009年前三季度国内生产总值为217817亿元,按可比价格计算,同比增长7.7%。

题型:填空题

When I was in the third grade, I was picked to be the princess in the school play. For weeks my mother had helped me practice my lines. But once on stage, every word disappeared from my head. Then my teacher told me she had written a narrator's part for the play, and asked me to change roles. Though I didn't tell my mother what had happened that day, she sensed my unhappiness and asked if I wanted to take a walk in the yard. It was a lovely spring day. We could see dandelions(蒲公英)popping through the grass in bunches, as if a painter had touched our landscape with bits of gold. I watched my mother carelessly bend down by one of the bunches. "I think I am going to dig up all these weeds," she said. "From now on, we'll have only roses in this garden." "But I like dandelions," I protested. "All flowers are beautiful-even dandelions!" My mother looked at me seriously. "Yes, every flower gives pleasure in its own way, doesn't it?" she asked thoughtfully. I nodded. "And that is true of people, too," she added. When I realized that she had guessed my pain, I started to cry and told her the fact. “But you will be a beautiful narrator,” she said, reminding me of how much I loved to read stories aloud to her. Over the next few weeks, with her continuous encouragement, I learned to take pride in the role. The big day finally came. A few minutes before the play, my teacher came over to me. “Your mother asked me to give this to you,” she said, handing me a dandelion. After the play, I took home the flower, laughing that I was perhaps the only person who would keep such a weed.

小题1:The girl did not play the role of the princess mainly because_____  

A.she felt nervous on the stage.

B.she lost her interest in that role.

C.she preferred the role of the narrator

D.she had difficulty memorizing her words小题2:Why did the mother suggest a walk in the garden?

A.To remove the dandelions

B.To enjoy the garden scene

C.to help her daughter with the play.

D.to have a talk with her daughter.小题3:What is the main idea of the story?

A.Everybody can find his or her own way to success.

B.Everybody should learn to play different roles

C.Everybody has his or her own value in the world.

D.Everybody has some unforgettable memory.

题型:填空题

食品接触面原则上不得使用木质材料(工艺要求必须使用除外),必须使用木质材料的工具,应保证不会对食品产生污染。

题型:填空题

CTV的电容器分压器漏油时,应按()处理。

A.查找原因

B.计划检修

C.停止使用

D.监督运行

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