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微波与天线部分简述前馈抛物线反射面天线的组成、配置及工作原理。

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If there is consistent evidence suggesting that voters punish corrupt ______, it is unclear whether this translates into increased support for challengers and higher political participation.

A. incumbents
B. misappropriation
C. defamation
D. litigation

Keep away from people who try to ______ your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.

A. peddle
B. belittle
C. expire
D. leverage

The cheery, harmonious universalism that Hollywood has promoted and relied upon for so long seems out of tune with the surrounding ______.

A. sound
B. harmony
C. euphony
D. cacophony

科学真理不是由共识决定的。对于科学，大多数人可能并往往是错的。而在科学界中，来自同行的压力是巨大的，会扼杀反对流行理论的声音。(consensus，stifle)