GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 3JO6AYW4I74BZQLEX

Since it is now (i)____________ to build the complex central processing unit of a computer on a single silicon chip using photolithography and chemical etching, it seems plausible that other miniature structures might be fabricated in (ii)____________ ways. A. unprecedented B. unique C. difficult D. similar E. routine F. undiscovered