频度
参考答案：
某物种在调查范围内出现的频率。
Our bodies are strengthened by taking exercise. _____, our minds are developed by learning. [ ]
A. Probably
B. Likely
C. Similarly
D. Generally
谜语题。
谜面：解落三秋叶，能开二月花。过江三尺浪，入竹万竿斜。
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