—Which one of these two dictionaries do you advise me to buy, Oxford or Longman?

—Well, take Oxford. I think it is the ________ of the two.

A．best

B．better

C．good

D．well

可燃液体蒸发蒸发的蒸汽能产生闪燃的最低温度称为闪点。闪点越低火灾危险性（）

A、降低

B、越小

C、越大

D、增大