如图所示,是某同学探究流体的压强与流速关系的实验,通过实验可以使我们更好地理解《

题型:填空题

问题:

如图所示,是某同学探究流体的压强与流速关系的实验,通过实验可以使我们更好地理解《交通规则》中的某些条款。如《交通规则》中规定,在公路上骑自行车的人,只能在规定的自行车道上行驶,不能在机动车道上行驶,如果自行车在机动车道上行驶,即使行驶在机动车道的边缘上也会容易发生交通事故。因为当机动车快速驶过时,机动车行驶处的空气流动速度               ,两车间的压强               ,人和自行车会在                   作用下被推向机动车而发生交通事故。

考点:流体压强和流速的关系
题型:填空题

阅读理解。

     One morning a fox sees a cock in a tree. He thinks, "This is my breakfast." He comes up to the

cock and says, "My dear cock! I hear you can sing very well. Can you come down and sing for me?"

The cock is very happy. He comes down and closes his eyes and then begins to sing. The fox sees

that and catches him in his mouth quickly and carries him away.

     The people in the field see the fox. They cry "Look! Look! The fox is carrying a cock away. " The

cock says to the fox. "Mr Fox, do you understand? The people say you are carrying their cock away.

Tell them it is yours not theirs."

     The fox opens his mouth and says. "The cock is mine, not yours." Just then the cock runs away

from the fox and flies into a tree.

1. Where is the cock?

A. In the tree.  

B. On the tree.

C. In the room.

D. On the floor.

2. The fox likes ______ the cock. 

A. to talk to      

B. to know    

C. to hear the cock singing  

D. to eat

3. Which sentence is wrong?

A. The fox knows the cock.      

B. The cock closes his eyes and begins to sing. 

C. The fox catches the cock in his mouth.

D. The fox carries the cock away.

4. The fox tells the people in the field the cock is ______. 

A. theirs          

B. their        

C. his          

D. yours

5. We can think ______ is smart. 

A. the fox        

B. the cock    

C. the people    

D. the farmer

题型:填空题

(8分)电场中某区域的电场线分布如图所示,已知A点的电场强度EA =" 4.0" × 104 N/C. B点的电场强度EB =" 9.0" × 104 N/C.将电荷量q =" +5.0" × 10-8 C的可视为点电荷的带电小球静置在电场中的A点后静止释放,小球沿直线AB运动到B点时小球的动能增加了3.5 × 10-4J,已知AB=8cm,不计小球受到的重力,

(1)求该点电荷在A点所受电场力的大小F(4分)

(2)A、B两点间的电势差UAB(4分)

题型:填空题

常用于诊断垂体瘤的性激素是()。

A.LH

B.FSH

C.PRL

D.ProG

E.E2

题型:填空题

选购笔记本电脑时,需要考虑笔记本的散热性。

题型:填空题

科学管理时期的管理理论将员工培训看做是______的原则之一。

A.管理

B.绩效

C.人力资源

D.开放式系统

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