小红同学在做“探究平面镜成像”的实验时,将一块玻璃板竖直架在水平直尺上,再取两段

题型:实验题

问题:

小红同学在做“探究平面镜成像”的实验时,将一块玻璃板竖直架在水平直尺上,再取两段完全相同的蜡烛AB,点燃玻璃板前的蜡烛A,小心地移动蜡烛B,直到与蜡烛A的像重合,如图所示.在此实验中:

(1).为了便于观察,该实验最好在__      ____

(选填“较明亮”或“较黑暗”)环境中进行;

(2).选取两段完全相同的蜡烛是为了比较像与物的     关系;

(3).直尺的作用是便于比较物与像____      ______关系;

(4).移去蜡烛B,并在其位置上放一光屏,则光屏上   (选填“能”或“不能”)接收到蜡烛A 烛焰的像,这表明平面镜所成的像是

    (填“虚”或“实”) 像;

考点:光的色散,色光的混合,物体的颜色平面镜成像的特点和原因
题型:实验题

实施目标管理的基本过程包括( )等环节。

A.分析预测

B.设置目标

C.部署工作

D.实现目标

E.检查评价

题型:实验题

阅读理解。

     Man invented a lot of sports equipments(器材). The first true piece was the ball.

     Thousands of years ago, in Egypt(埃及), throwing stones was children's favourite game. But a badly

 thrown stone could hurt a child.Looking for something less dangerous to throw,the people in Egypt made

 the first balls.

     At first, they used tree leaves to make balls. They used vines(藤) to keep the leaves together. Later

 they began to use pieces of animal skin and fill them with some light things. These balls were much better

 than the old ones.

     Before long they invented a lot of ball games, each had its own rules. They began to play these ball

 games according to the rules. They thought that ball playing was one of the best ways to teach the

young men to be brave(勇敢) and strong.   

1. ____, so the Egyptians invented balls instead.

A. Throwing stones was a popular game for children  

B. Stones were too heavy to throw

C. Stones might hurt children        

D. They hadn't so many stones

2. They preferred playing balls than throwing stones because ____.

A. balls were lighter than stones    

B. they were looking for something

C. balls were easy to make        

D. throwing stones was more dangerous

3. They made the first balls with ____.

A. leaves and vines    

B. animal skin    

C. something light  

D. something better

4. The Egyptians invented ____ very long ago.

A. many different kinds of games    

B. many different games with balls

C. throwing stones                

D. dangerous games

5. Ball playing ____.

A. would teach the young men how to play games

B. would make the young people healthier

C. could be more interesting

D. could be the best way to study well

题型:实验题

主梁中配置预应力束筋、纵向主筋、斜筋以及作各种验算时,需要作出主梁的()

A、弯矩图

B、剪力图

C、影响连线图

D、包络图

题型:实验题

我国宪法规定,国家尊重和保障****。下列关于该条款的表述,正确的有:()

A、该条款在八二宪法制定时予以明确规定

B、该条款对于理解基本权利具有指导作用

C、该条款为未列举基本权利提供了规范基础

D、该条款为国家设定了尊重、保障和实现****的义务

题型:实验题

WWW客户与WWW服务器之间的信息传输使用的协议为

A.HTML

B.HTTP

C.SMTP

D.IMAP

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