皮皮学，免费搜题
登录
搜题
【单选题】
宜家公司木头衣架的销售单价是 3元,单位变动成本为2元,西服罩的单价是5元,单位变动成本为3元,宜家公司每卖出五个衣架会卖出一个西服罩,则宜家公司每一个该销售组合的贡献是( )元。A.
6
B.
7
C.
8
D.
9
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I'm doing my homework. Could you please _____ the TV a little? [ ]
A.
turn up
B.
turns up
C.
turn down
D.
turns down
【单选题】Will you __ the light? It's dark in the room. I can't see clearly. [ ]
A.
turn on
B.
turn of
C.
turn down
D.
turn up
【单选题】有两台PID调节器R1和R2,其参数整定为PB1Ti2,Tdl>Td2,这表示______。
A.
R1的比例作用比R2强,R1的积分和微分作用比R2弱
B.
R1的比例作用比K2弱,R1的积分和微分作用比R2强
C.
R1的比例、微分作用比R2强,积分作用比R2弱
D.
R1的比例、微分作用比R2弱,积分作用比R2强
【单选题】Finally, save your document before you ________ your computer.
A.
turn on
B.
turn up
C.
turn off
D.
turn down
【单选题】I'm reading now. Please tell him the TV a bit. [ ]
A.
turn up
B.
turn off
C.
to turn down
D.
turn down
【单选题】We invited her to dinner but she didn’t even bother to _______.
A.
turn in
B.
turn up
C.
turn on
D.
turn down
【单选题】__________ the radio, please. I want to listen to the weather report. [ ]
A.
Turn on
B.
Turn off
C.
Turn down
D.
Turn up
相关题目：