If we have數(shù)學(xué)公式＜0，a-b＜0 and a+b＞0，then the points in real number axis，given by a and b，can be represented as
（英漢詞典point：點；real number axis：實數(shù)軸；represent：表示）


  1. A.
  2. B.
  3. C.
  4. D.
A
分析：根據(jù)題意，有＜0可得a、b異號，a-b＜0 可得a＜b，a+b＞0可得a＞-b，綜合可得，a＜0＜-a＜b，分析選項可得答案．
解答：根據(jù)題意，有＜0可得a、b異號，
a-b＜0 可得a＜b，
a+b＞0可得a＞-b，
綜合可得，a＜0＜-a＜b，
分析可得，A符合．
故選A．
點評：本題考查實數(shù)與數(shù)軸的關(guān)系，要求學(xué)生會判斷實數(shù)的大小關(guān)系，進(jìn)而再數(shù)軸上表示．
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