It is well-known that ____ year 2020 saw many developments in ____ science and technology, with those in the field of s

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1. (2021高二下·依兰月考) It is well-known that ____ year 2020 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.

A . /; / B . /; the C . the; the D . the; /

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