姐姐一家在国内工作，常来美国出差旅游。如果我给她们申请了移民，在等排期的漫长十年中，她们是不是就没法再以其它签证来美国了？
-It does not affect her family members (spouse and kids). It is also possible for her to get the B2 visa even if you file the I-130 for her.
See the following from the website of the US Emassy in China:
http://beijing.usembassy-china.org.cn/niv_misreps.html
Shouldn't I conceal the fact that I have applied to immigrant, and that I have a prior visa refusal?
The risks of fraud are serious. Applicants who provide incorrect information, conceal relevant facts, or misrepresent their cases may become permanently ineligible to enter the United States. All approved applications are checked against computer records to see if certain information on the application was truthfully presented. It is common in China for an applicant to have relatives in the United States or a petition to immigrate on file. These factors by themselves will not necessarily prevent approval of your application.
