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There are an extremely large number of ants worldwide. Each individual （个体的） ant hardly weigh anything， but put together they weigh roughly the same as all of mankind． They also live nearly everywhere， except on frozen mountain tops and around the poles. For animals their size， ants have been astonishingly successful， largely due to their wonderful social behavior.
In colonies （群体） that range in size from a few hundred to tens of millions， they organize their lives with a clear division of labor. Even more amazing is how they achieve this level of organization. Where we use sound and sight to communicate， ants depend primarily on pheromone （外激素）， chemicals sent out by individuals and smelled or tasted by fellow members of their colony. When an ant finds food， it produces a pheromone that will lead others straight to where the food is. When an individual ant comes under attack or is dying， it sends out an alarm pheromone to warn the colony to prepare for a conflict as a defense unit.
In fact， when it comes to the art of war， ants have no equal. They are completely fearless and will readily take on a creature much larger than themselves， attacking in large groups and overcoming their target. Such is their devotion to the common good of the colony that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.
Behaving in this selfless and devoted manner， these little creatures have survived on Earth， for more than 140 million years， far longer than dinosaurs. Because they think as one， they have a collective （集体的） intelligence greater than you would expect from its individual parts.
根据材料回答68-71题。 We can learn from the passage that ants are ____________.
2011年6月1日。甲公司以自二级市场购入120万股乙公司股票（每股8元）。共支付价款960万元，另支付交易费用3万元。甲公司将该投资划分为可供出售金融资产。2011年12月31日，该股票的价格为每股9元。2012年12月31日。乙公司股票的价格为每股5元。甲公司预计乙公司股票的价格将持续下跌。2013年12月31日。乙公司股票的价格为每股6元。假定不考虑其他因素，2012年甲公司利润表因股票下跌应确认的减值损失是（）万元。
事物的矛盾包括两个基本属性，斗争性与同一性，下列强调同一性的是
①君子喻于义，小人喻于利
②垃圾，就是放错了位置的资源
③卑鄙是卑鄙者的通行证，高尚是高尚者的墓志铭
④没有当年中国人民的抗日战争，就不会有今天的和平生活
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