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A.52+15n>70+12n
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B.52+15n<70+12n
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C.52+12n>70+15n
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D.52+12n<70+15n
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A.10x-5(19-x)≥90 | B.10x-5(19-x)>90 |
C.10x-(19-x)≥90 | D.10x-(19-x)>90 |
A.0.16x+0.96(100-x)≤40 | B.0.96x+0.16(100-x)≤40 |
C.1.76x+0.96(100-x)≤40 | D.0.96x+1.76(100-x)≤40 |
A.100(1-5%)x≥1140 | B.100(1+5%)x≥1140 |
C.100(1+5%)x≤1140 | D.100(1-5%)x≤1140 |
A.4x+2(10-x)>30 | B.4x-2(10-x)>30 |
C.4x-2(10-x)≥30 | D.4x+2(10-x)≥30 |
A.30+30×15%≤85%y | B.30+30×15%≥85%y |
C.30-30×15%≤85%y | D.30-30×15%≥85%y |
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B.![]() |
C.![]() |
D.![]() |
A.2+(-3)=-5 | B.4-(-2)=2 |
C.(-3)+(-9)=12 | D.(-7)+4=-3 |
A.甲、乙都正确 | B.甲、乙都不正确 |
C.只有甲正确 | D.只有乙正确 |
A.(-5)+9=-(9-5) | B.7-(-10)=7-10 |
C.(-5)+0=-5 | D.(-8)+(-4)=8+4 |
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