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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?

提问时间:2021-04-01

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....
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