阅读理解。阅读下列短文, 从给的四个选项 （a、b、c和d） 中, 选出最佳选项。
what makes a person a scientist？does he have ways or tools of learning that are different from those of others？the answer is “no”．it is not what the tools that a scientist uses but how he uses these tools that makes him a scientist.you will probably agree that knowing how to use the power is important to a carpenter （木
