A．Physician.B．Psychologist.C．Fictional writer.D．Historian.

下列程序段中哪一组将a，b变量值交换？（)（A) a=a－bb=a＋ba=a－b（B) b=a＋ba=a－bb=a－b（C) a=a＋bb=a－ba=

What does the author of this passage most probably do？A．Physician.B．Psychologist.C．Fiction

A．Physician.B．Fictional writer.C．Psychologist.D．Historian.

According to the passage, what is Scribbler50？A．A physician.B．A psychologist.C．A science w

根据算符▽的微分性与矢量性，推导下列公式： ▽（A·B)=B×（▽×A)＋（B·▽)A＋A×（▽×B)＋（A·▽)B A×（▽×A)=▽A2－（A·▽)A

It can be inferred from the passage that, in the authors view, traditional detective ficti