1 |
a |
1 |
x2007 |
1 |
x2007 |
1 |
x2005 |
1 |
x |
1 |
x |
1 |
x3 |
1 |
x2007 |
1 |
x |
1 |
x3 |
1 |
x2007 |
1 |
x |
1 |
x3 |
1 |
x2007 |
1 |
x |
1 |
x3 |
1 |
x2007 |
A.a不是负数,可表示成a>0 |
B.x不大于3,可表示成x<3 |
C.m与4的差是负数,可表示成m-4<0 |
D.x与2的和是非负数,可表示成x+2>0 |
A.2个 | B.3个 | C.4个 | D.5个 |
1 |
x |
A.①②③⑤ | B.①②③④ | C.①②③④⑤ | D.②③⑤ |
1 |
3 |
A.2个 | B.3个 | C.4个 | D.5个 |
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