简介:二次根式(a~2)~(1|2)和((a~2)~(1|2))有什么区别吗?主要表现在下面三个方面:1.读法不同.(a~2)~(1|2)读作根号a的平方,而((a~2)~(1|2))读作括号根号a括号的平方.2.表示的意义不同.(a~2)~(1|2)是求a~2。的算术平方根.((a~2)~(1|2))求的是a的算术平方根的平方.一个表示求一
简介:贵刊2004年第3期在《问题·争鸣》栏里登载了戴、代二位老师的《“1:2”不能写成“1/2”吗》一文,认为1:2可以写成1/2。2005年第二期又刊了王老师的《也谈“1:2”与“1/2”》一文,他认为,比就应写成“1:2”的形式,而�
简介:对端线掷球进攻1-2-1-1全场区域紧逼方法的战术选择进行了分析。
简介:随着《指环王3:王者归来》在电影奥斯卡奖的评比中满载而归,这部影片将会在中国热播,有关魔戒的电影之旅也将会随之而结束,这里,让我们回顾一下《指环王1:友谊之戒》中的歌曲MayItBe曾获BFCACritics'Choice奖,拉斯维加斯电影Critcs'Society最硅歌曲奖和第59届金球奖“最佳原刨歌曲”提名。
简介:The global capital market has grown so rapidly in recent decades. So I would like to discuss about it in the essay. ,Why has the global capital market grown so rapidly in recent decades,before more than doubling to $ 1.22 trillion in 1999--rivaling the US total. The global value of M&
简介:Cerebral Aneurysm statistics in United States The true incidence of intracranial aneurysms is unknown but is estimated at 1-6% of the population (Wiebers,and another series found aneurysms in 1% of patients undergoing 4-vessel cerebral angiography for indications other than subarachnoid hemorrhage (SAH). Familial intracranial aneurysms have been reported (Schievink,1997). Whether this represents a true increased incidence is unclear. Aneurysms typically become symptomatic in people aged 40-60 years