By means of simulation, the authors research the over-voltage level at AC and DC sides of converter station as well as arrestor operation condition caused by last breaker trip occurred in inverter station of UHVDC power transmission project from Yunnan to Guangdong; analyze and reveal the interrelations among over-voltage level, various operation conditions and different action delay of DC protections and propose the requirement to the time of protection coordination to ensure secure and reliable operation of equipments for the project.

文章對云廣特高壓直流系統(tǒng)逆變站最后斷路器跳閘引起的換流站交直流側(cè)過電壓水平以及避雷器工況進行仿真研究，分析揭示不同運行工況、不同直流保護動作延時與過電壓水平的相互關(guān)系，提出對保護配合時間的要求美国一极黄片，以確保系統(tǒng)設(shè)備能安全可靠運行。

BARBARA KLEIN: When crime scene investigators arrive at the place of a crime, they first try to make sure the area is secure.

巴巴拉克萊因：當犯罪現(xiàn)場調(diào)查人員在對犯罪的地方到達美女白丝黄视频在线免费观看a，他們第一次嘗試国产欧美AAA√，以確保該地區(qū)是安全的。

You can do to keep your computer secure is to practice what the Ars Technica news ...

你可以做a在线视频，以保證計算機的安全…性欧美视频A片AA片…，就是通過練什么，人工魚礁technica新聞欧美性高潮。国产免费黄片精品视频2。。

Their sense of duty is unwavering. It was not so easy to secure the same assurance from the Ashen Order, however.

他們的責任感是不會動搖的国产三级精品三级在，然而www色色.com，要從灰袍修道院那得到同樣的保證就不是這么容易了。

In this paper, the demand and measure of security for the internet tax payment system in our work have been introduced. The investigation and analysis of the real security in the internet tax payment system reveal that the secure risks are mostly from damages of software and hardware, malice code, virus attack, error operation of legitimate user, attack and destruct of malice assaulter and hacker.

本文以作者的實際工作為基礎(chǔ)日韩侵犯精品视频在线播放，對網(wǎng)上報稅系統(tǒng)的安全需求及已采取的安全措施進行了簡要介紹国产真人一级做a片，通過對網(wǎng)上報稅系統(tǒng)安全現(xiàn)狀的調(diào)查和分析，了解到其安全威脅主要來自系統(tǒng)的軟硬件故障一区高清精品视频在线观看、惡意代碼和病毒的攻擊影音先锋视频资源、合法用戶的誤操作亚洲一级性爱、惡意攻擊者或黑客利用系統(tǒng)的安全漏洞及管理上的漏洞進行惡意攻擊和破壞等幾方面男人和女人做视频毛片。

They have been up and running since 1999, so it is most assuredly stable and secure.

他們自1999年以來一直和運行，所以它是最穩(wěn)妥的穩(wěn)定和安全亚洲va在线va欧美va。

Developing the evidence-based medicine will provide more secure,more effective and more economical examinations and treating methods to asthenopia.

開展循證醫(yī)學可以為視疲勞提供更安全黄色α片、有效、經(jīng)濟的檢查和治療方法亚洲18一区视频。

Retirement assets such as individual retirement accounts cannot be used to secure loans , but even they may indirectly count in a borrower's favor as evidence of astuteness .

個人退休金帳戶之類的退休資產(chǎn)雖然不能用來做貸款擔保人人干全免费黄色视频，可即便如此，它們卻會證明你很精明国产高清线在线观看不卡视频网站，并因此而博得貸方的好感狼色精品中文字幕在线视频。

Retirement assets such as individual retirement accountscannot be used to secure loans,but even th ey may indirectly count in aborrower's favor as evidence of astuteness.

個人退休金帳戶之類的退休資產(chǎn)雖然不能用來做貸款擔保，可即便如此亚洲一二三精品，它們卻會證明你很精明欧美精品一区二区福利视频一区，并因此而博得貸方的好感。

You can secure the lowest interest rate at the time.

你可以找到當時的最低利率。