不等式ln 2x+lnx＜0的解集是（   ）。

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  A：a＝-1，b＝2 

  B：a＝-4，b＝-9 

  C：a＝-1，b＝9 

  D：a＝-8，b＝-10 

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• 2方程 X 2－PX＋6＝0 的解集为M，方程X 2＋6X－q＝0 的解集为N，且M∩N＝｛2｝，那么P＋q＝（   ）。

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• 3a＜0，关于x的不等式x 2-3ax+2a 2＜0的解集为（   ）。

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