问题 实验题

(5分)某探究学习小组的同学欲“探究小车动能变化与合外力对它做功的关系”,在实验室设计了一套如图所示的装置,图中A为小车,B为打点计时器,C为弹簧测力计,P为小桶(内有沙子),M是一端带有定滑轮的足够长水平放置的木板.

(1)要顺利完成该实验,除图中实验仪器和低压交流电源(含 导线)外,还需要的两个实验仪器是________、_________.

(2)小组中一位成员在完成该实验时发现系统摩擦力对实验 结果影响较大,请你帮助该同学设计一种测出系统摩擦力大小的方法.

_____________________________                               

答案

(1)刻度尺(1分)  天平(1分)

(2)调整小桶内沙子的量,当打点计时器在纸带上打出间隔相等的点迹时,此时弹簧测力计的读数即为系统摩擦力的大小(只要原理正确、方法得当、结论正确,均可得分)(3分)

题目分析:(1)在纸带上找两个清晰地计数点,用刻度尺测出两点的间距即为小车位移,绳子的拉力可以由弹簧秤示数读出,用平均速度求出这两点小车的瞬时速度,再用天平测量小车的质量。

(2)利用平衡摩擦的思想,当小车匀速运动时绳子的拉力等于小车受到得摩擦力。

单项选择题
阅读理解

____1. Mathew majors in media and hopes to understand Chinese broadcasting and TV News and

communicate with the Chinese people.

____2. Sarah is a learner of Chinese with a fairly good knowledge of basic Chinese grammar and a

vocabulary of 2500, hoping to improve her Chinese ability in speaking, reading and writing.

____3. Lois majors in Teaching Chinese as a Foreign Language and hopes to improve her ability in

translation.

____4. Dennis once has taught himself Chinese and can speak a little Chinese but with poor

pronunciation and grammar, hoping to meet the needs of everyday life and study, and understand each

other in basic communication through training.

____ 5. Georgia specializes in the Chinese language and culture at the average. He plans to have a

tour in China.

                  

                                      A. Comprehensive language skill training

     100 lessons in total focusing on pronunciation, grammar and discourse (语段). To enable the learner

to master the basic knowledge of the Chinese language, to have the basic ability of listening, speaking,

reading and writing, so that they are able to communicate with others and to meet the needs of everyday

life, study and sociality. This will lay a foundation for further study of Chinese.

                              B. Intermediate (中等) Chinese Comprehensive Course

     40 lessons in all, focusing on the training of the comprehensive skills of listening, speaking, reading

and writing of intermediate Chinese. To enable the students to recognize, understand and use the active

and less active words, to improve their ability of expressing themselves in paragraphs and discourse, to

master the new words, patterns, grammatical structures, paragraphs and discourse and means of

connections so as to express the meaning of the texts correctly and fluently in paragraphs and discourse.

                                                    C. News Listening

     Based on frequently used words, typical sentences and information and concentrating on improving

the ability of listening comprehension. To improve the ability of collecting information, to grasp the

knowledge and skills they have learned and to understand the broadcasting and TV news of similar

themes and relevant level of difficulty with the correctness of 80%. To build up the foundation for further

study.

                                  D. Elementary English-Chinese Translation

     25 classes in total, including various styles such as poems, popular science, political comments and

news, about every aspect of everyday life. The texts vary from easy to difficult and combine theory with

practice as well as translation and interpretation. About 185 hours are needed. To familiarize the learner

with the equivalent (对应的) Chinese expressions of English. To enable them to know usage of Chinese

and English words and sentences, cultural differences and the background knowledge.

                                E. Elementary Spoken Chinese in Business

     24 units in all. Chinese words and expressions in business and trade are introduced in the form of

vivid situational dialogues, notes and exercises. To enable the learner to master the words and

expressions of elementary spoken business Chinese and to communicate with others in trade and

business.

                                  F. Chinese Human Geography

     Introduction to geographic environment and cultural phenomena in various parts of China, such as

natural features, historical backgrounds, religious sites, ancient battle fields, dramas and arts, traditional

products, and special food, etc. Through the introduction to historical and cultural sites and scenery, the

learner will have a general view about Chinese geography, history, culture and regional features.