学生 | A1 | A2 | A3 | A4 | A5 |
数学(x分 | 89 | 91 | 93 | 95 | 97 |
物理(y分) | 87 | 89 | 89 | 92 | 93 |
x | 6 | 8 | 10 | 12 |
y | 2 | 3 | 5 | 6 |
A.①②⑤③④ | B.③②④⑤① | C.②④③①⑤ | D.②⑤④③① |
年份 | 2004 | 2005 | 2006 | 2007 |
恩格尔系数(%) | 47 | 45.5 | 43.5 | 41 |
A.(2,8) | B.(2.5,8) |
C.(10,31) | D.(2.5,7.75) |
x | 6 | 8 | 10 | 12 |
y | 2 | 3 | 5 | 6 |
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