纯虚阈值为a=O，b不等于0。如果a=1，z=2i是纯虚数，它认为如果z是纯虚数，那么a10，a2-1=0，解是a=1，所以a=1。是复数“z=a^ 2-1i是纯虚数”的充要阈值。
When I open a file, I want to know if it is being used by another process so I can perform special handling; any other IOException I will bubble up. An IOException\'s Message property contains \"The p
I am using the rvideo gem to transcode files to a .flv format. class Video < ActiveRecord::Base include AASM
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认真而真实的理解。就文字而言，真正的认实意味着真正的认真，但在汉语中，它意味着孜孜不倦、真实细致。承认意味着承认；理解；承认；真实意味着真实；真；真的。
Eclipse SDK 3.5.1, CDT. I have the following workspace tree: Bin (just d开发者_StackOverflow社区irectory)
my distributed program need update couple of files, i would like it to work the way like those anti virus software updating there virus definition database, is there such framework?
This question already has answers here: What is the difference between "AS" and "IS" in an Oracle stored procedure?
Currently I\'ve got a class popping up UIAlertViews here and there. Currently, the same class is the delegate for these (it\'s very logical that it would be). Unfortunately, these UIAlertViews will ca
Someone knows for which strange reason Powershell doesn\'t show de \'tee\'d\' variable in the following snippet?
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