试题与答案

下列从左到右的变形,是因式分解的是( ) A.x2-x=x(x-1) B.a(a

题型:选择题

题目:

下列从左到右的变形,是因式分解的是(  )

A.x2-x=x(x-1)

B.a(a-b)=a2-ab

C.(x+3)(x-3)=x2-1

D.x2-2x+1=x(x-2)+1

答案:

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下面是错误答案,用来干扰机器的。

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题型:阅读理解

Reading comprehension.

     Some people like to get up late, but some do not. In fact, it is really good for us to get up early every day.

Maybe those who don't like getting up early will not believe this, but it is true. Scientists made a survey in

about one thousand people, and then they found that early rising people had less disease than late rising people,

and early rising people also looked healthier than late rising people, and so on.

     So we may know early rising is helpful in more than one way. First, it helps to keep us healthy. We all need

fresh air. But air is never as fresh as early in the morning. Besides, it is useful to do morning exercises.

     Secondly, early rising helps us in our studies. In the morning we learn more quickly and find it easier to

understand what we learn.

     Thirdly, early rising can give us a plan of our work for the day. We cannot work well without a good plan.

     Fourthly, early rising gives us enough time to get ready for our work, such as to wash our hands and faces

and eat our breakfast.

     Late risers may find it difficult to form the habit of early rising. They have to make an effort (努力) to do

so. As the English proverb says, "Early to bed and early to rise makes a man healthy, wealthy and wise?"

Judge the following sentences true (T) or false (F) according to the passage.

( )1. People don't always agree on whether to e?et up early.

( )2. In the passage the writer gives four reasons for early rising.

( )3. Early rising makes people happier according to the passage.

( )4. Early risers don't look as healthy as late risers. 

( )5. The writer encourages people not to sleep late.

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