若虫以取食拔节期稻株存活率最高。
The survival rate of nymphs feeding on rice plant at elongation stage was the highest.
本文给出了华罗庚五素数平方定理的算术级数形式，证明了其中一个素数可 以取在大模的算术级数中。
In this paper, we generalize Hua's five primes squares theorem, and prove that one of the primes can be taken in arithmetic progressions with large moduli.
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