These are terms used in digital electronics to designate the basic logical operations ____ digital s

题目

These are terms used in digital electronics to designate the basic logical operations ____ digital systems are founded.
A. of which B. on which C. in which D. at which
Why B?

答案

be founded on (the operations)建立在……的 基础上 补充下,这个是倒装句,原句是These are terms used in digital electronics to designate the basic logical operations on which digital systems are founded....