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Laser-dopple radar ______ . [br] Implied but not stated ______ .A、Laser-dopple r
Laser-dopple radar ______ . [br] Implied but not stated ______ .A、Laser-dopple r
游客
2025-07-28
8
管理
问题
Laser-dopple radar ______ . [br] Implied but not stated ______ .
选项
A、Laser-dopple radar is more accurate than microwave radar
B、Microwave radar may not ensure absolute precision in measuring varying speeds
C、The light-beam radar can measure only slow speeds with accuracy
D、Microwave radar operates at a higher frequency than laser-dopple radar
答案
B
解析
根据第一段第二句及第二段第一句可推断B正确。A项已在文中明确提出过,C和D项与原文相反。
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