Citizenship and Immigration Services | Homeland Security
Nov 25, 2025 · Citizenship and Immigration Services Ombudsman CIS Ombudsman provides individual case assistance, and makes recommendations to improve the administration of immigration benefits.
什么是CIS？ - 知乎
CIS实例： Kenwood Kenwood原名为Trio，曾经是日本3个老牌音响之一，后来因为跟不上市场发展脚步，业绩一落千丈。 Trio原与山水、先锋并称为三大音响公司，其中只有先锋一家顺应潮流采量产 …
Citizenship and Immigration Services Overview - Homeland Security
Overview of USCIS which oversees lawful immigration to the U.S., administering the nation’s lawful immigration system.
CIS Ombudsman | Homeland Security
May 23, 2025 · CIS Ombudsman serves as a liaison between the public and U.S. Citizenship and Immigration Services (USCIS) - How to Submit a Case Assistance Request
Citizenship and Immigration Services - Homeland Security
Managed by U.S. Citizenship and Immigration Services (USCIS), the United States’ lawful immigration system is one of the most generous in the world.
CIS、CMOS是两种不同的传感器吗? - 知乎
CCD领域应用为数码摄影、天文学。 4、制造工艺的不同 CCD、CIS、CMOS、由于感光单元及读出电路结构不同而导致制造工艺的不同。 CCD需要专用的工艺制程实现；CIS图像感光单元为光电二极 …
How to Submit a Case Assistance Request | Homeland Security
When and how to submit a case assistance request and the types of cases the CIS Ombudsman's Office can help with.
DHS/USCIS/PIA 009 Central Index System | Homeland Security
Jun 22, 2007 · The Department of Homeland Security (DHS) U.S. Citizenship and Immigration Services (USCIS) maintains the Central Index System (CIS). CIS is a repository of electronic data that …
如何理解顺式作用元件、反式作用因子中的“顺式”“反式”？ - 知乎
Jun 21, 2023 · 这个概念其实很简单，和什么DNA到蛋白质还是蛋白质到DNA的方向没有任何关系。要想真正完全理解这个概念，请耐心看完： 顺式（cis -）和 反式（trans -）是一对适用范围非常广的概 …
CIS 2 serves as a DHS-wide index system to track the location of case files, including Alien Files (A-File), and to maintain alien status and repository of information. CIS 2 contains information on the …