题目

Surfing the Internet for fun will make you a better employee，according to an Australian study． The University of Melbourne study shows that people who use the Internet for their  own reasons at work are about 9 percent more productive than those who do not．Study author Brent  Coker said，“Surfing the Internet at times helps increase an employee’s attention” “People need to relax for a bit to get back their attention”Coker said on the university’s website． “Having a short break，such as a quick surfing of the Internet，helps the mind to rest itself，leading to a high若两条直线与互相平行，则等于（   ）A．2B．1C．D．