c |
a |
d |
b |
A.bc<ad | B.bc>ad | C.
| D.
|
c |
a |
d |
b |
cb-ad |
ab |
A.方案甲较为划算 |
B.方案乙较为划算 |
C.P1<P2时方案乙较为划算 |
D.P1>P2时甲方案较为划算 |
A.-a<-b<b<a | B.b<-a<-b<a | C.-a<b<-b<a | D.-b<-a<b<a |
1 |
3 |
1 |
3 |
1 |
3 |
A.a<b<c | B.c<b<a | C.c<a<b | D.b<a<c |
A.m<a<b<n | B.a<m<n<b | C.a<m<b<n | D.m<a<n<b |
1 |
a |
1 |
b |
A.②③④ | B.①③④ | C.①②④ | D.①②③④ |
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