31.  However, on the other hand, many freshmen become so addicted to it, either computer games or chatting, that they just can't prevent themselves from continuously using it, as a result, their average grades drift from A to B.

32.  For example, a for B to provide goods or services, a will have the right to claim compensation for BThe end is Asymmetric information, because of the economic activities in which information is different, some people can take advantage of information fraud, this will damage the legitimate transactions, when the people of fraud concerns seriously affect the trading activities, with normal market action will be lost, the market allocation of resources function or malfunction.

33.  Student's grades drift from an A to B because of too many hours for surfing the internet.

34.  Those who always got a "A" in exams have drifted to a mediocre "B" for being addicted to the Internet.

35.  As is widely believed, children are obsessed with the computer all day long and are apparently transformed into computer addicts, whose grades drifted from an average A to a mediocre B.

36.  As a result, their grades may drift from "A" to "B".

37.  Worse still, students who are lost in the cyberspace always forget their homework or fail the classes, resulting in their score drifting from A to a mediocre B.

38.  Looking around, how many students who are cyber addicts behaved like a boastful alcoholic and make their "A" average drifted to a mediocre "B"?

39.  2 Area B .

40.  B: It deserves trust in food security.