本文给出p—遗传环的定义及循环模的子模闭的充要条件。
This paper gives the definition of P-hereditary ring and discusses the necessary and sufficient condition about the submodule closure of cyclic module.
是右半遗传环当且仅当任一右R模的两个上平坦子模的和上平坦；
R is semihereditary ring if and only if the sum of two coflat submodules of every R module is coflat module;
遗传和环紧的相对影响在同卵双胞胎中最易观察到。
The relative effects of heredity and environment are most clearly observable in identical twins.
本文给出并证明了右遗传、右完备环上投射模的对偶模仍然是投射模。
This Paper gives and proves the dual module of a projective module over aright hereditary and right perfect ring is stil projective.
文中着重阐述了遗传算法理论基础、运算过程及其基本实现技术，并通过在MATLAB6.5.1环境下对遗传算法进行编程，实现了光学薄膜遗传算法优化设计的功能。
The paper had mainly described the theoretical principle, arithmetic process and implementation of GA. Besides, GA had been programmed in the MATLAB6.5.1 for optimal design of optical thin film.
结论多环芳烃类混合物具有较强的遗传毒性，可使职业工人在早期接触阶段出现P 2 1的高表达。
Conclusion Polycyclic aromatic hydrocarbons (PAHs) has a strong genetic toxic effect and can cause P21 level increase in earlier stage among occupational workers.
结论：理中汤对环磷酰胺产生的遗传毒性有明显的抑制作用。
Conclusion: Lizhong Decoction has obvious inhibiting effect on genetic toxicity caused by CTX.
文章对滨州学院在校学生的拇指类型、食环指类型、通贯纹、卷舌、耳垂五对性状进行了抽样调查，研究分析其遗传方式。
This article is the investigation to the students of Binzhou university in thumb, ring finger food type, Wen-penetration, rolling and the earlobe.
文章对滨州学院在校学生的拇指类型、食环指类型、通贯纹、卷舌、耳垂五对性状进行了抽样调查，研究分析其遗传方式。
This article is the investigation to the students of Binzhou university in thumb, ring finger food type, Wen-penetration, rolling and the earlobe.
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