练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情
    计算题
    1.
    Answer:                                                                                
    2. Bill is eighteen years old, and his age is three times that of Mary.  
    When Billis twice as old as Mary, how old is he then?
    Answer:                                                                        
    1. 8kg   2. 24 years old．
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中英语 来源：2010-2011江西宁冈高一下学期期中英语试卷 题型：阅读理解

    What makes a person a scientist? Does he have ways or tools of learning that are different from those of others? The answer is “no”. It isn’t the tools a scientist uses but how he uses these tools which make him a scientist. You will probably agree that knowing how to use a power is important to a carpenter. You will probably agree, too, that knowing how to investigation, how to discover information, is important to everyone. The scientist, however, goes one step further; he must be sure that he has a reasonable answer to his questions and that his answer he gets to many questions is into a large set of ideas about how the world works.
    The scientist’s knowledge must be exact. There’s no room for half right or right just half the time. He must be as nearly right as the conditions permit. What works under one set of conditions at one time must work under the same conditions at other times. If the conditions are different, any changes the scientist observes in a demonstration(实证) must be explained by the changes in the conditions. This is one reason why investigations are important in science. Albert Einstein, who developed the Theory of Relativity, arrived at the theory through mathematics. The accuracy(正确性) of his mathematics was later tested through investigation. Einstein’s ideas were proved to be correct. A scientist uses many tools for measurements. Then the measurements are used to make mathematical calculations(计算) that may test his investigations
    【小题1】 What makes a scientist according to the passage?

    A．The tools he uses.B．His ways of learning
    C．The way he uses his toolsD．The various tools he uses
    【小题2】 “…knowing how to investigation, how to discover information, is important to everyone.”
    The writer says this to show ___________.
    A．the importance of information
    B．the difference between scientists and ordinary people.
    C．the importance of thinking
    D．the difference between carpenters and ordinary people
    【小题3】 A sound scientific theory should be one that _________.
    A．works under one set of conditions at one time and also works under the same conditions at other times
    B．doesn’t allow any change even under different conditions
    C．Can be used many times under different conditions
    D．Can be used for many purposes
    【小题4】 What is the main idea of the passage?
    A．Scientists are different from ordinary people.
    B．The Theory of Relativity.
    C．Exactness is the core (核心) of science.
    D．Exactness and way of using tools are the keys to making of a scientist.

    查看答案和解析>>

    科目：高中英语 来源：同步题 题型：填空题

    计算题
    1. What percentage of area is shaded?

    Answer: _                                                          .
    2. If a group of 6 people have an average age of 21,  and each person is half the age of the next person,
        what are the ages of the 6 people?
    Answer: _                                                           .

    查看答案和解析>>

    科目：高中英语 来源：同步题 题型：阅读理解

    计算题。
    1. Kate has a quzuler more books than Peter and Peter has a third more books than Jill.
    Altogether they have 120. How many books does each person have?
    Answer: __________________________________________________________
    2. What weight must be placed at "?" to balance the Scale?

    Answer:____________________________________________________________

    查看答案和解析>>

    科目：高中英语 来源：同步题 题型：阅读理解

    计算题.
    1.At 12 noon my watch was correct. However, it then started to lose 18 minutes per hour.
    Four hours ago it stopped completely and is now showing the time as 15:30.
    What is the correct time now?
    Answer: _____________________________________________________________
    2.
    What value of weight should be placed on the scales to balance?
    Answer: _____________________________________________________________

    查看答案和解析>>

    同步练习册答案