报告指出，以前病毒制造者与安全厂商之间的对抗，主要是逃避查杀，而今则演变为主动对抗。即病毒对安全软件进行专门的攻防试验，试图制造可以越过或关闭杀毒软件的病毒。此外，2007年出现的新病毒还增多了传播手段，如，加壳病毒、利用流行软件的漏洞传播、利用移动介质传播等。由此，2007年全国约有7300多万台电脑曾受病毒感染。
另外，以盗取网络游戏账号为目的的“网游盗号木马”病毒成为新的毒王。“QQ通行证”病毒和“灰鸽子”病毒分列第二、第三位。在各省疫情方面，广东依旧排名最前，约有911万台电脑受到攻击，江苏、浙江紧随其后。上海则约有305万台电脑受到病毒感染，排在第7位。
值得注意的是，“恶意网站”成为新的安全热点，包括网页挂马、钓鱼网站、流氓网站等在内的恶意网站成为新的威胁来源。
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1.177
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30-60
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≤10
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15
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350
700
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1400
4500
6200
2600
9800
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常见故障 产生原因
排除方法
洗砂量减少或漏砂
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传动部分噪音大
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Indian schoolchildren hold flowers and candles in memory of those killed in the Mumbai attacks in Mumbai. [Agencies]
At the same time, Secretary of State Condoleezza Rice said the US expects Islamabad to pursue any leads that point to a Pakistani connection to the assault on India's financial capital that ended Saturday.
"What we are emphasizing to the Pakistani government is the need to follow the evidence wherever it leads," Rice said at a news conference in London . "I don't want to jump to any conclusions myself on this, but I do think that this is a time for complete, absolute, total transparency and cooperation, and that's what we expect."
Related readings:
Gunmen 'trained in Pakistan'
Pakistan's top security team to discuss tension with India
Pakistan denies India accusations on Mumbai attacks
India-Pakistan ties chill after attacks
Rice is cutting short a European trip later this week to visit India for talks on the crisis. The Bush administration also has ordered the FBI and US intelligence agencies to support the investigation into who was responsible for the attack, which killed at least 170 people, including six Americans.
The India-Pakistan frictions have jeopardized US efforts to encourage the longtime rivals to improve relations. The US wants Pakistan to feel confident enough to redeploy crack troops from its eastern border with India to fight al Qaida and allied Islamic extremists in the tribal area bordering Afghanistan .
India , which has been battling Pakistan-backed separatist groups in the disputed Kashmir region for years, has charged that unspecified "elements in Pakistan " were involved in the assault.
New Delhi's prime suspect is Lashkar-e-Taiba , an Islamic militant group based in Pakistan that's been fighting in Indian-controlled Kashmir. US analysts say the group once enjoyed the backing of Pakistan's main intelligence agency, the Directorate for Inter-Services Intelligence Directorate, or ISI, but that support has diminished since 2002, when former Pakistan President Pervez Musharraf banned the group.
India has based its allegation of a Pakistani link to the Mumbai attack in part on the interrogation of the only surviving gunman, identified by Indian officials as Ajmal Qasab , from the village of Faridkot, near the city of Multan, in the Pakistani province of Punjab.
However, inhabitants of the impoverished farming hamlet told a visiting McClatchy reporter on Monday that there was no such resident by that name or anyone who resembled the photographs taken of the alleged gunman as he fired at people in Mumbai's main railway terminal on Wednesday.
Leaders of Pakistan's civilian coalition government, elected in February, have denied any involvement in the Mumbai assault and pledged to support India's efforts to identify and track down those responsible.
Pakistan has demanded that India document its claim of a Pakistani link, and warned that it may have to shift troops fighting al Qaida and Pakistani extremists to the eastern border with India .
In a television interview on Monday, Pakistan's president, Asif Ali Zardari, called the terrorists "non-state actors."
White House spokeswoman Dana Perino said Monday the US government, which sent an FBI team to Mumbai last week, has seen nothing to contradict Islamabad's denials of involvement.
"I've heard nothing that says the Pakistani government was involved," Perino said. "We have been encouraged by the statements by the Pakistanis that they are committed to following this wherever it leads. We would expect nothing less of them."
Some US intelligence and counter-terrorism officials have declined to rule out the possibility that sympathetic elements within the ISI or Pakistani military intelligence may have aided the terrorists, however.
They've also questioned whether Lashkar-e-Taiba was solely responsible, pointing out that the terrorists who assaulted Mumbai apparently sought out Americans and British citizens, something that the group hasn't done previously. These officials spoke anonymously because they weren't authorized to speak to the news media.
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