The disabled people shouldn’t ______. Instead, we should be friendly to them.

A．look down

B．look down on

C．be looked down on

D．be looked down

某产品各功能的功能系数和成本系数见表8-1，应列为价值工程优先改进对象的是 ( )功能。表 8-1 各功能系数和成本系数

A．功能

B．F₁

C．F₂

D．F₃

E．F₄

F．功能系数

G．0.36

H．0.2

I．0.25

J．0.19

K．成本系数

L．0.3

M．0.2

N．0.26

O．0.24