A.由x>y,且m≠0,得-
| ||||
B.由a>b,且c≠0,得ac<bc | ||||
C.由x>y,得xz2>yz2 | ||||
D.由xz2>yz2,得x>y |
x |
m |
y |
m |
x |
m |
y |
m |
A.a+c>b | B.a-c>b-c | C.ac>bc | D.a÷c>b÷c |
A.4a>3b | B.a2>ab | C.a-3<b-3 | D.a>b-4 |
A.2m-3>2n-3 | B.5m>5n | C.-
| D.m-n>0 |
A.x+9>y+9 | B.x-9>y-9 | C.9x>9y | D.9-x>9-y |
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