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单项选择题
【单选题】Lesson one Text A vocabulary multiple choices-9 In the beginning of the 21st century, subsonic military aviation focused on eliminating the pilot in favor of remotely operated or completely _____ vehicles.
【单选题】Lesson one Text A vocabulary multiple choices-9 In the beginning of the 21st century, subsonic military aviation focused on eliminating the pilot in favor of remotely operated or completely _____ vehicles.
A、autonomous
B、operated
C、manned
D、piloted
A.
