电子游戏为我们展现了一个不同于现实生活的新世界，人们在游戏里取得的成功是可以清晰定义的而且是可以实现的，玩家可以在游戏中控制整个世界，从而摆脱现实生活的焦虑感，使自己的行为在虚拟世界中变得举足轻重，成为一名英雄，游戏结束，他并没有真的输掉或赢得什么东西。这段话直接支持这样一种观点，即：
A．电子游戏完全是虚拟的东西，所以没有必要去浪费时间
B．人们可以通过电子游戏在真实世界和欲望世界中寻求心理平衡
C．人们在电子游戏中的成功是实在的，而且可以用来赚钱
D．游戏让人们不付出代价，轻松地满足成就感
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下列哪项不属于交通政策的范畴（）
A.优先发展公共交通
B.限制私人小汽车数量盲目膨胀
C.开辟公共汽车专用道
D.建立渠化交通体系
黏连性心包炎时心尖搏动
A．正常
B．向上移位
C．向下移位
D．呈负性心尖搏动
E．向左下移位
我国现行宪法规定，依法服兵役和参加民兵组织是我国公民的（ ）
A．权利和义务
B．神圣职责
C．光荣义务
D．神圣权利
有机氯农药比拟除虫菊酯类农药问世早.
Optimism is the art of always seeing the glass half full (1) half empty, finding something positive in even the most (2) of situations and last but not least the ability to expect the best even if the chances are (3) . It enables you to try new things, deal with failure as a learning experience (4) a stopping point. In general optimism gives you a reason to live. The world would be a better place if it was full of optimism, (5) unfortunately the trend in today’s youth is (6) the opposite way. Today it is (7) to be pessimistic. One could spend hours discussing how we arrived at this point, (8) our youth refuses to smell the roses and instead prefers to (9) themselves on their own pessimistic (10) .
Optimism is not an (11) gift but rather a learned behavior (12) . Like most behaviors optimism is best learned by watching examples, (13) you. The first step in creating a generation of people with a positive outlook on life, is to (14) life on the bright side yourself. (15) it would be wrong to (16) your child from all negativity, it is important that you are not the (17) of doubts and worries. Finding something positive in a negative situation needs to be (18) Show how to make the best of things by always (19) the positive, by encouraging your child after a(n) (20) and by explaining over and over that failure is just a part of progress.
20（）
A.obstruction
B.impediment
C.disappointment
D.hindrance