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The United States of America has been a melting pot since its beginning.

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And he launched a speech, eloquently advocating his army of the future.

Speed and reliability are the chief advantages of the electronic computers.

下列植物属于芸香科的植物有（）。

A. 柚子
B. 金桔
C. 脐橙
D. 枣

下列植物属于芸香科的是（）。

A. 竹叶椒
B. 木蜡
C. 木莲
D. 构树