问题 问答题

要测量物体的质量,实验室中常用______.生活中有时也用如图甲所示的案秤,它们的工作原理相同.使用案秤时,应先将游码移至秤杆左端______刻度线处,此时若秤杆右端上翘,应将调零螺母向______(填“左”或“右”)调,使秤杆在水平位置平衡.某次测量,槽码和游码的位置如图乙所示,则被测物体的质量是______Kg.

答案

(1)日常生活中,测量物体质量的工具很多,例如杆秤、电子称、台秤.实验室测量物体质量的仪器是天平.

(2)案秤的工作原理和使用方法和天平是使用是一样的.首先调节横梁平衡,再称量物体质量.游码首先移到标尺左端的零刻度,调节调零螺母,使天平的横梁平衡,哪端上翘向哪端移到调零螺母.

(3)秤杆每一个大格代表100g,每一个小格代表20g,游码对应的刻度值是200g=0.2kg.物体的质量=槽码的质量+游码对应的刻度值=2kg+1kg+0.2kg=3.2kg.

故答案为:天平;零;右;3.2.

阅读理解

I read a letter of a mother of a gifted child to an expert with gifted children stating that her son was always complaining that he doesn’t like his teacher for she talks in baby language and she lets them sing baby songs. Having an insufficient(不足够的) understanding of being different from their normally developing classmates, gifted children may find themselves wanting to learn more than being boxed with other kids of their age. They want to quench(解渴) their thirst for knowledge. However, in the process, they tend to develop negative(负面的) thoughts about school and teachers. Thus, they tend to exhibit behavioral problems.

Behavioral problems of gifted children could be mainly correlated(相关的) to their asynchronous(不同步的) development. This development means that the child has uneven(不均衡的) development in their mind, body and emotions. To explain further, a gifted child may live in different ages at once. He may show high intellectual(智力的) capabilities at some point but the time his emotions rule, he would go back to his true age going through tantrums(脾气发作) and endless sobbing(哭泣). He maybe find it happy playing with kids his age but the next day, he would be bored with that and he would find conversing with older kids to be more challenging.

Because of high intellectual level, a gifted child often acts differently in his own classroom. He has the thinking of being above from the rest of his classmates when it comes to grades, academic awards and school recognitions. In classroom discussions, the child may be very cooperative(合作的) having advanced knowledge in the lessons but it is mostly that he will suffer from boredom as he is not challenged by the lessons and he would feel no improvement with them.

小题1:Which of the following best explains the asynchronous development?

A A child has good development both in mind and body.

B A child cannot get along well with his classmates.

C A child is intellectually developed but not equal with emotionally.

D A child doesn’t feel happy with his school and teachers.

小题2:What is most likely to be talked about in the paragraph following the passage?

A How a gifted child gets along with his classmates.

B How to get a gifted child involved(被卷入) in a classroom discussion.

C What can arouse(激发) a gifted child’s interest.

D How a teacher should handle a gifted child in class.

小题3:We can infer from the passage that ______.

A we needn’t pay special attention to gifted children

B a gifted child is well above others in every way

C it’s best to teach a gifted child separately

D teaching a gifted child can be challenging

单项选择题