A．repairsB．reproducesC．remakesD．reuses

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=

（） is an important concept since it allows reuse of a class definition without requiring

A．We can invent ways of increasing rainfall.B．We can develop ways of reusing water and

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

One disadvantage of reusing treated wastewater is .YOU WOULD.N."T E.XPE.C.T A.N. I.N.

Nowadays people sometimes separate their waste to make it easier for it .A. reusing B.