解析库 > 填空经典1290题
Making the shift to the 90-nanometer manufacturing process has been (i)_____ for semiconductor companies. This process effectively doubles the manufacturing capacity of the industry, but it (ii)_____ enormous technical challenges because some components of the new semiconductor chips are no more than five to seven molecule thick.
- an unanticipated boon
- a routine accomplishment
- a significant struggle
a significant struggle , entails 显示答案