Since it is now ___ 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 ___ ways.
| Blank (i) | Blank (ii) |
| A unprecedented | D unique |
| B difficult | E similar |
| C routine | F undiscovered |
选CE
翻译：既然今天借助照光刻和化学蚀刻技术，在一块硅制集成电路片上制造结构复杂的电脑CPU已属平常，似乎也可以用类似的办法制作其他微型构造物。
unprecedented 空前的，史无前例的，新奇的
routine 平凡的，日常的，普通的，例行公事的
