The doctor and writer _________ in Harbin last year.[ ]
A. is
B. are
C. was
D. were
答案:C
《地基规范》规定承台的最小宽度为:()
A.300mm
B.400mm
C.500mm
D.600mm
()等是信息的载体,其中两个或多于两个的组合构成了多媒体。