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5、将正三角形每条边四等份,然后过这些分点作平行于其它两边的直线,则以图中线段为边的菱形个数为(  )

(A)15  (B)18  (C)21   (D)24

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4、若实数满足方程组:, 则有(  )

(A)x+2y+3z=0 (B) 7x+5y+2z=0  (C) 9x+6y+3z =0  (D)10x+7y+z=0

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3、的末尾三位数字是(  )

(A)125  (B)375  (C)625   (D)875

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2、化简的结果是(  )

(A)  (B)  (C)   (D)

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本题共有6小题,每题均给出了代号为的四个答案,其中有且仅有一个是正确的.将你所选择的答案的代号填在题后的括号内.每小题选对得7分;不选、选错或选出的代号字母超过一个(不论是否写在括号内),一律得0分.

1、从分数组中删去两个分数,使剩下的数之和为1,则删去两个数是(  )

(A)  (B)  (C)  (D)

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14. You should throw these old papers into _________ basket.

A.  a paper   B. paper   C. papers   D. the papers

Keys:

1-5. BDCBB      6-10. ABBBA     11-14. CCDA

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13. It is a good piece of advice to write that on ___________.

A. a white paper   B. a paper of white   C. a white piece of paper   D. a piece of white paper

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12. An electric light can give us rich light. We all think it great for Edison to invent __________.

A. electric light   B. an electric light   C. the electric light   D. electric lights

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11. Do you go to school every day before you went to _________ university

A.  a   B. an   C. the   D. /

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10. One evening he came to borrow the book 《Robinson Crusoe》from me and promised to get through it _________ one evening.

A. in   B. on   C. about   D. /

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