____colour is the cover of the dictionary?
A.What
B.Which
C.How
D.Whose
答案:A
固体分散物的类型有( )
A.混悬型
B.固态溶液
C.共沉淀物
D.低共熔混合物
E.溶胶型
PC机中DRAM内存条的类型有多种,若按存取速度从高到低的顺序排列,正确的是:
A.SDRAM,RDRAM,EDO DRAM
B.RDRAM,SDRAM,EDO DRAM
C.EDO DRAM,RDRAM,SDRAM
D.RDRAM,EDO DRAM,SDRAM