【单选题】听力原文:M: Do you think home video players will replace movie theatres and force them out of the entertainment business? W: Movie's certainly faced with the grave challenge from the DVD industry,that's w...
A.
It is being forced out of the entertainment industry.
B.
It should change its concept of operation.
C.
It should revolutionize its technology.
D.
It is a very good place to relax.
【单选题】下列探测器属于“面源”探测器的器件是( )
【多选题】关于MHC-II类分子的叙述,下列哪些不正确?
【判断题】( )测量中,交流测量仪表指示的电压、电流读数一般为有效值,如通常所说的交流电压220V、380V,是指交流电压的有效值。
【多选题】关于MHC-II类分子的叙述,下列哪些是正确的?