驾驶员不同的驾驶习惯，在职业驾驶员中可导致汽车运行燃料消耗量相差10％－20％。所以，要重视节能驾驶。
参考答案：对
_____ the Internet is of great help, I don't think it's a good idea to spend too much time on it.[ ]
A. If
B. While
C. Because
D. As
下列______语句可以将变量A，B的值互换。
A．A=B: B=A
B．A=A+B: B=A-B: A=A-B
C．A=C: C=B: B=A
D．A= (A+B) /2: B
