顾客评价

$a_2$

$a_3$

$a_4$

$b_1$

[0.6, 0.8, 1]

[0.4, 0.6, 0.8]

[0.4, 0.6, 0.8]

[0.6, 0.8, 1]

$b_2$

[0.4, 0.6, 0.8]

[0.6, 0.8, 1]

[0.6, 0.8, 1]

[0.4, 0.6, 0.8]

$b_3$

[0.6, 0.8, 1]

[0.6, 0.8, 1]

[0.4, 0.6, 0.8]

[0.4, 0.6, 0.8]

$b_4$

[0, 0.2, 0.4]

[0.3, 0.5, 0.7]

[0.4, 0.6, 0.8]

[0.3, 0.5, 0.7]