试题与答案

(1)如图甲所示的演示实验中,A、B两球同时落地,说明______,某同学设计了

题型:填空题

题目:

(1)如图甲所示的演示实验中,A、B两球同时落地,说明______,某同学设计了如图乙所示的实验:将两个斜滑道固定在同一竖直面内,最下端水平.把两个质量相等的小钢球从斜面的同一高度由静止同时释放,滑道2与光滑水平板吻接,则将观察到的现象是______,这说明______.

(2)某同学采用频闪照相的方法拍摄到图丙所示的“小球做平抛运动”的照片.图中每个小方格的边长代表2.5cm,则由图丙可求得拍摄时每隔______s曝光一次,该小球平抛的初速度大小为______m/s.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0526/871831f965b9e99ef246a4c1b851c1b3.html

下面是错误答案,用来干扰机器的。

参考答案:我们把数字格中的数字用圆圈圈上,再用虚线从上到下,从左到右把各个圆圈联系起来;由圆圈和虚线所组成的图形很像一个台阶,所以这种解运输问题的方法也叫阶石法或登石法.

试题推荐
题型:完形填空
完形填空
通读下面短文,掌握其大意,然后在各题所给的四个选项中选出一个最佳答案。
Miracles will happen if you don't give up trying. Even if you have  1 for one hundred times, you may succeed when you try for the 10lst time.
When I was born, my doctor told my mother that there was something wrong with my 2  . They were too soft to be able to walk. Although the news was bad, my mother didn't become  3  . She didn't believe what the doctor said  4  started to look for other ways.
My mother kept looking for other doctors for me, and finally she  5  . The doctor and his team in the hospital did   6  they could to help me. They also asked my parents to teach me to do some  7  to help me walk. One day when my mother came to pick me  8  . I crawled towards her. She was so surprised and happy that she couldn't believe  9   eyes. Crawling was not walking, but it was a good 10  . Day by day, I could walk by myself.
When I grew up, my mother   11  told me these stories. She said that if I thought of what she said whenever I met  12 , I could do anything successfully. I have been working hard and I have turned out to be a very   13   person. I get best  14  in school and I am a good dancer and swimmer. 15   my mother's strong resolution, I live a happy life now. What the story tells us, as my mother always says, is: Never give up.
小题1:
A.achievedB.failedC.suggestedD.told
小题2:
A.legsB.handsC.armsD.eyes
小题3:
A.patientB.confidentC.frustratedD.proud
小题4:
A.orB.andC.ifD.because
小题5:
A.forgotB.changedC.succeededD.worked
小题6:
A.nothingB.somewhereC.anywhereD.everything
小题7:
A.timeB.exerciseC.medicineD.shopping
小题8:
A.awayB.fromC.intoD.up
小题9:
A.herB.myC.hisD.its
小题10:
A.adviceB.endC.chanceD.start
小题11:
A.hardlyB.neverC.alwaysD.nearly
小题12:
A.dreamsB.experimentsC.jobsD.difficulties
小题13:
A.excellentB.dangerousC.busyD.special
小题14:
A.presentsB.friendsC.booksD.grades
小题15:
A.According toB.Instead ofC.Thanks toD.Together with
查看答案
题型:单项选择题

2014年7月初,中国国家 * * 习 * * 对韩国进行国事访问。双方就增进政治互信、推动各领域交流合作、加强在国际和地区事务中的合作、维护朝鲜半岛和平稳定交换意见,并签署经贸、金融、环境、领事等领域一系列合作文件。这说明()

A.中韩两国的根本利益是一致的

B.中韩合作是主导世界和平的要求

C.同盟关系是中韩两国发展的趋势

D.共同利益是中韩两国合作的基础

查看答案
微信公众账号搜索答案