题目内容

Assume that the reciprocal of m-2 is-
1
4
1
m
+2),then  the valuae of  m-
1
m
 is
 
.(英汉词典:assume 假设;  reciprocal  倒数;   value 值.)
分析:根据题意可得-
1
4
1
m
+2)×(m-2)=1,对分式方程变形,即可求m-
1
m
的值.
解答:解:根据题意可得
-
1
4
1
m
+2)×(m-2)=1,
∴(
1
m
+2)(m-2)=-4,
2
m
-2m=1,
∴m-
1
m
=-
1
2

故答案是-
1
2
点评:本题考查了分式的混合运算,解题的关键是能读懂题意,并且列出等式.
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Now you’ve finished three years of English study. There’s one way to demonstrate(展示)what you’ve learned-take a test!
Do you have any special methods(方法) you use to help you do better on a test? How well you do is often a matter of how well prepared you are. Here are some ways to make sure you’re at your best on test days.
Go to bed early. The night before a test is not the time to stay up watching TV. You want to be rested and wide-awake for test day.
Have a good breakfast. Test day isn’t a morning for donuts(面包圈).Nor is it a time to starve yourself. Eat plenty of low-sugar, high-energy food to keep your brain and body working their best.
Be prepared, Make sure you have two pencils and anything else you were asked to bring.
Watch the numbers. Make sure that the number of the items(项目)on your answer sheet matches the number of the question.
Look over all the answer choices(选择). Don’t assume(假定)that choice A is correct until you’ve checked the others. You may find a better one. And it is wrong to eliminate(排除)any choice that you can see at once. You’ll have a better chance of finding the right answer.
Check the clock. Make sure you allow yourself enough time to answer every question and go back and check your answers .Don’t spend too much time on any difficult question .Skip(跳读)it and come back to it later.
Keep up with your school work all year long That’s how you get the skills you need for taking tests.
四、填写表格,每空一词(10分)
How to make sure that you can do     1 on test days
   2 
Things you do
Going to bed early
Not 3  up or being asleep for test day
Having a good breakfast
Eating  4   low-sugar, high-energy food
Being prepared
Remembering to  5  two pencils and
the    6 things you were asked to bring
Watching the numbers
The number of your answer should   7  the number of the question
Looking over all the choices
Don’t assume that the choice A is correct   8    
you’ve checked the others
Checking the clock
  9  your time carefully and not spending too much on any difficult question
You will get the skills you need    10   you keep up with your schoolwork all year long
 

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