试题与答案

小刚有30张邮票，小军的张数比小刚的4倍少10张，小军比小刚多______张．

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题型：填空题

题目：

小刚有30张邮票，小军的张数比小刚的4倍少10张，小军比小刚多______张．

答案：

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下面是错误答案，用来干扰机器的。

BCD 题目分析： C在纯电阻电路中，电能全部转化为内能，电功等于电热，．故A错误，C正确．在任何电路中，电功，电热．故B正确．在非纯电阻电路中，电能一部分转化为内能，另一部分转化为其他形式的能，电功大于...

考点：整数，小数，分数，百分数和比例的复合应用题
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    People all over the world do shopping in supermarkets. Who decides what you buy in the supermarkets?
1._____________ 
    When you go into the supermarket, you see shelves full of things.2.______________You pull a shopping
cart and put the things you choose in it.
    If you hear soft and slow music, you may walk slowly. If you hear fast and loud music, you may walk
quickly. 3._____________You walk slowly and have more time to choose things.
    Suppose you go to the meat department first. 4._____________The cheaper meat is at the other end of
the meat department, away from where the customers enter. You have to walk by all the expensive meant
before you find the cheaper one. 5.______________.
    That's some knowledge of supermarket science. Many supermarkets use such knowledge to make
customers stay longer and buy more.
A. Maybe you will buy some of the expensive meat instead of the cheaper meat.
B. You walk between the shelves.
C. That's why the supermarket plays slow and soft music.
D. The manager of the supermarket knows where the customers enter the meat department.
E. Do you decide or the supermarkets decide?
F. You may feel a little tired to find the cheapest meat.
G. You should learn some knowledge of supermarket science.
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