试题与答案

如图所示,是小明在“探究平面镜成像的特点”的活动中所选用的器材和活动过程。 (

题型:探究题

题目:

如图所示,是小明在“探究平面镜成像的特点”的活动中所选用的器材和活动过程。

(1)在探究活动中对玻璃板放置的要求是____,

(2)选择蜡烛A和B的要求是____;

(3)如果在图甲中蜡烛像的位置上放一张白纸板做屏幕,则白纸板上将____(填写 “有 ”或“没有”)蜡烛的像;此现象说明____

(4)把蜡烛B放到蜡烛A像的位置上,将会看到图丙所示的现象。这说明____。

(5)实验中将蜡烛逐渐远离玻璃板时,蜡烛所成像的大小____(选填“变大”、  或“变小”或“不变”),实验中哪个现象能证明你的观点?____  

(6)小崔想还有没有其他方法可以测量像距?

于是小崔把刻度尺和蜡烛并在一起,读出了蜡烛的长度,又在平面镜里看到了蜡烛和刻度尺的像,就可以透过平面镜读出蜡烛像的大小。以上方案是否可行,请你对其进行评价。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0516/ba84daceb0b5a8e4061c1ea1f3a2d3cc.html

下面是错误答案,用来干扰机器的。

答案:C

试题推荐
题型:阅读理解

三、阅读理解(共15 小题,30分)

I like friends who share my happiness and sorrow,and who possess wings of their own and fly with me. I seek friends whose qualities illuminate(照亮)me and help me to express my love. It is for these people that I reserve the glowing hours, too good not to share.

When I was in the eighth grade, I had a friend. We were shy and “too serious” about our studies when it was becoming fashionable with our classmates to learn acceptable social behaviors. We said little at school, but she would come to my house and we would sit down with pencils and paper, and one of us would say,“Let’s start with a train whistle today.” We would sit quietly together and write poems or stories that grew out of a train whistle. Then we would read them aloud. At the end of that school year, we too, were changing into social creatures and the stories and poems stopped.

When I lived for a time in London, I had a friend. He was in despair(失望) and I was in despair, but our friendship was based on the idea that we would be sorry later if we did not explore this great city because we felt awful at the time. We met every Sunday for five weeks and visited many wonderful places. We walked until our despair disappeared and then we parted. We gave London to each other.

For almost four years I have had a remarkable friend whose imagination illuminates mine. We write long letters to each other in which we often discover our strangest selves. Each of us appears, sometimes in a funny way, in the other’s dreams. She and I agree that, at certain times, we seem to be parts of the same mind. In my most interesting moments, I often think: “Yes, I must tell…” We have never met.

It is such comforting companions I wish to keep. One bright hour with their kind is worth more to me than the lifetime services of a psychologist(心理学家), who will only fill up the healing(愈合的) silence necessary to those darkest moments in which I would rather be my own best friend.

1. In the eighth grade, what did the author do while her classmates started developing proper social behavior?

A. Become serious about her studies.      B. Went to her friend’s house regularly.  

C. Learned from her claamates at school.   D. Wrote poems and stories with her friend.

2. In Paragraph 3, “We gave London to each other” probably means “______”.

A. our exploration of London was a memorable gift to both of us

B. we were unwilling to tear ourselves away from London

C. our unpleasant feelings about London disappeared

D. we parted with each other in London

3. According to Paragraph 4, the author and her friend                .

A. call each other regularly       B. have similar personalities

C. write stories                 D. sometimes dream about each other

4. In the darkest moments, the author wants to              .

A. seek professional help         B. be left alone

C. stay with her best friend       D. break the silence

5. What is a good title for the passage?

A. Unforgettable Experiences     B. Remarkable Imagination

C. Lifelong Friendships            D. Noble Companions

查看答案
微信公众账号搜索答案