A.－2                               B.2                           C.                                 D.－

A.≥0                                                   B.≤0

C.(x－3)(x－2)≥0                                                  D.≥0

A.{x|－2＜x＜1或x＞1}                                         B.{x|x＜－2或x＞1}

C.{x|x＞－2}                                                       D.以上均不正确

A.{x|c＜x＜b或x＞a}                                             B.{x|x＜c或b＜x＜a}

C.{x|x＜c或x＞a}                                                  D.{x|x＞a或x＜b}

A.{x|x＜－2或－≤x≤或x＞2}

B.{x|x≤－2或－≤x≤或x≥2}

C.{x|x＜－2或－＜x＜或x＞2}

D.{x|－2≤x＜－或＜x≤2}

A.(－2，－1)∪(1，+∞)                                         B.(－2，1)∪(1，+∞)

C.(－2，－1)∪(－1，+∞)                                      D.(－∞，－1)∪(1，+∞)

A.{x|x≤2ab或x≥a²＋b²}                                      B.{x|x＜2ab或x≥a²＋b²}

C.{x|x＜2ab或x＞a²＋b²}                                      D.{x|2ab＜x≤a²＋b²}

A.{x|x＜b或x＞a}                                       B.{x|x＜－a或x＞b}

C.{x|b＜x＜a}                                           D.以上均不正确

A.{x|1＜x＜2或x＞5}                                            B.{x|x＞5或x＜1}

C.{x|x＜1或x＞2}                                                 D.{x|x＜1或2＜x＜5}

A.{x|x＞－1且x≠2}                                              B.{x|x＞2或x＜－1}

C.{x|－1＜x＜2}                                                  D.以上均不正确