据测算,我国每天因土地沙漠化造成的经济损失为1.5亿元,用科学记数法表示这个数据

题型:填空题

问题:

据测算,我国每天因土地沙漠化造成的经济损失为1.5亿元,用科学记数法表示这个数据为______元.

考点:科学记数法和有效数字
题型:填空题

阅读理解。

     As young students, you have many dreams. These dreams can be very big, such as winning the

 Nobel Prize; they can also be small, such as becoming one of the best students in your class.

     Once you find a dream, what do you do with it? Do you ever try to make your dream real?

     Andrew Matthews, an Australian writer, tells us that making your dreams real is life's biggest challenge.

  You may think you're not very good at some school subjects, or that it's impossible for you to become a

  writer. Those kinds of ideas stop you from realizing your dream.

     In fact, everyone can realize his dream. The first thing you must do is to remember what your dream is.

  Don't let it leave your heart. Keep telling yourself what you want every day and then your dream will

 come true faster. You should know that a big dream is, in fact, made up of many small dreams.

     You must also never give up your dream. There will be difficulties on the road to your dream is. But the

  biggest difficulty comes from yourself. You need to decide what is the most important. Studying instead of

  watching TV will help you to get better exam results, while saving five yuan instead of buying an ice cream

  means you can buy a new book.

     As you get closer to your dream, it may change a little. This is good as you have the chance to learn

 something more useful and find new hobbies.

1. The biggest difficulty on the road to your dreams comes from _____.

    A. yourself          

    B. your friends  

    C. your school    

    D. your parents

2. Which of the following isn't mentioned in this passage?

    A. You may think you're not good at some school subjects

    B. Making your dreams real is life's biggest challenge.

    C. You must never give up your dream.

    D. Listening to English more can help you realize your dream.            

3. If we have dreams in our hearts and work hard, our dreams _____.

    A. can't be realized      

    B. can be very small  

    C. will come true    

    D. can be very big

4. How do you make your dream come true faster?

    A. Remember what your dream is.  

    B. Don't let your dream leave your heart.

    C. Keep telling yourself what you want every day.

    D. A, B and C.

5. The best title (标题) of this passage is _____.

    A. How to become a writer  

    B. How to make your dream real

    C. A big dream is made up of small dreams

    D. Everyone can realize his dream

题型:填空题

发育成桃子果皮的是(  )

A.子房壁

B.胚珠

C.子房

D.受精卵

题型:填空题

如何停止在背景中执行的应用程序?

题型:填空题

红十字保护性标志和标明性标志使用时的区别是什么?

题型:填空题

LAVATORY SMOKE(盥洗室烟雾)在下列哪一个阶段受抑制?()

A、1500FT-接地

B、接地-80KT

C、一发加至起飞功率-80KT

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