Cyber technology is among the few core technologies whose edges must be sharpened domestically to maintain social stability and_

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问题 Cyber technology is among the few core technologies whose edges must be sharpened domestically to maintain social stability and______ the national interests.

选项 A、safeguard
B、prevent
C、protest
D、save

答案A

解析 safeguard“保护,捍卫”;prevent“防止,预防”;protest“抗议,主张”;save“解救,保存,保全”。根据题意,本题选A。
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