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6.     如果数列对任意满足,且,则等于()

A.1024     B.512         C.510       D.256

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5.      过点且方向为的光线经过直线反射后通过椭圆的左焦点,则这个椭圆的焦距长等于(   )

A.1     B.     C. 2     D. 4

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4.     若,则角的终边落在(  )上                  

  A.        B.

  C.         D.   

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2.     已知幂函数的图象经过点,则的值为(.  )  

A.           B.            C.2             D.1  

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1.     若条件:复数是纯虚数,条件,则的(  .  ) 

  A.充分不必要条件         B.必要不充分条件 

C.充要条件           D.既不充分也不必要条件                         

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11.   Now more and more students are getting hear-sighted in schools because they have paid little attention to the care

of their eyes.

即时练习:

英国有句俗话,“Early to bed and early to rise, make a man healthy, wealthy and wise.”请以 “Form a Good Habit” 为题,谈谈早起的好处。

[写作内容]

a)     有些学生迟到,是因为晚起;

b)     晚起不仅影响学习,而且也是一种坏习惯;

c)     早起是一种好习惯,因为它能给你带来很多好处。早起有助于身体健康,有助于学习,有助于品德培养。

[写作要求]

只能使用5个句子表达全部内容(开头结尾已经给出)。

参考词汇:品德培养:train character  

     Some students are often lat for class because they get up late.                                               

                                               

                                              

                                              

                                               

                                              

                                              

I hope everyone will form the good habit of getting up early.

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10.   There are many ways of keeping good health.

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9. As we all know, spending too much time on TV may have bad effects on our work and health, especially on our eyes.

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8. From now on, we ought to break away from the bad habit and form a good one.

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