The prefixes “in-”, “im-”, “ir-” and “il-” are totally identical and they are interchangeable.

__________ measurement is the key to producing interchangeable parts and mass producing goods. A: Accuracy B: Precision C: Perfection D: Detail

So much of modem fiction in the United States is autobiographical, and so much of the autobiography fictionalized, that the（）sometimes seem largely A: authors... ignored B: needs... unrecognized C: genres... interchangeable D: intentions... misunderstood

The resolution of a microscope refers to () A: Its power to increase an object’s apparent size B: its ability show detail clearly C: its series of interchangeable objective lenses D: its power to scan the surface of an object