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
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
3、的末尾三位数字是( )
(A)125 (B)375 (C)625 (D)875
2、化简的结果是( )
(A) (B) (C) (D)
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)
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
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
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
11. Do you go to school every day before you went to _________ university
A. a B. an C. the D. /
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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