根

No longer need or use a similar double root consisting of three drill pipe drilling means root, it can reduce the derrick height, the weight of the base can be reduced.

不再需要采用类似双根或三根钻杆构成的立根钻井方式，因此井架高度可以减小，底座的重量可以减轻。

AIM:To extract pueraia isoflavone and soyisoflavones with n-butanol by means of inner ebullition from Radix puerariae lobatae.

用少量乙醇溶液润湿葛根粉末使其中的葛根异黄酮充分解吸，然后加入一定温度的含水正丁醇溶液，使渗透到葛根组织内部的乙醇沸腾，强化提取过程。

This study will assess elementarily the security and effectiveness of The root and leaf of Panicled Fameflower through the experimental studies on their pharmacodynamics and acute toxicology, provid possibly theorems and experimental foundations for Panicled Fameflower' s edibleness, planting and study.

本课题通过土人参根、叶的药效和急性毒性实验研究，对土人参根、叶治疗"脾虚"证、土人参叶"解毒消痈"的疗效和部分作用机制做出初步评价、并取得土人参根、叶急性毒性数据，为保健中药蔬菜土人参的食用提供客观的药效学和急性毒性的实验依据，以促其进一步推广应用、种植、研究。

In this paper, the author proves that the generalized Newton's method for finding me roots of an algebraic equation converges to the root, real or complex , nearest to the starting point. A tabulation method is then devised and used in four illustrative examples.

在本文内，作者首先证明了求代数方程根的推广牛顿法收敛于离出发点最近的一个根，其次设计了一种简单的列表计算法，最后通过四个例题说明用这种方法可以逐步接近代数方程的实根或复根。

Mycorrhizal fungi enter the velamen and exodermis through root hair, invade the cortical tissue by the exodermal passage cells and then form pelotons.

独花兰具有典型的兰科植物菌根构造，在光学显微镜下可以观察到菌根真菌从根毛进入根被和外皮层，通过通道细胞侵入到皮层薄壁组织，在皮层薄壁细胞内形成菌丝团。

So, endomycorrhiza was formed betweenD. candidum roots and strain AR-15. There were several nucleoli and nuclei in thecortical cells next to exodermis when a nucleus transfer across the cell wall wasobserved. Sometimes plant roots were damaged by strain AR-15. The microstructure of D.

真菌AR-18倾向于根生长，在根周围形成了一个包围圈，由根被细胞侵入外皮层通道细胞及其相邻的皮层细胞，然后向其他皮层细胞推进；真菌菌丝也可由皮层细胞侵入外皮层细胞。

But it becomes difficult to repeated-root cyclic codes, because X -1 can not factor uniquely over a finite ring when n is not prime to the characteristic of the residue field of the ring.

主要内容分为以下几个方面：第一，给出了环F_2+uF_2上长度为2n的重根循环码及其对偶码的结构，进一步讨论了这类重根循环码与单根循环码二者之间的极小Lee-重量关系。

Man is but a reed,the feeblest in nature,but he is a thinking reed.

人只不过是一根芦苇，是自然界中最脆弱的那一根，但他是一根会思想的芦苇。

This paper analyzes the property of FNT, the characteristics of Kernel Matrixes and the relationship between Kernel Matrixes of two-dimensional Fermat number transform whose modulus are odd prime and image data, and presents and proves the deduction of the theorem which demonstrates the relationship among different transform matrixes corresponding to different roots of unity under the same odd prime modulus of FNT, and reveals the essence of FNT whose modulus are odd prime.

分析二维Fermat数变换性质、正反变换核的特点、二维模为奇素数的二维Fermat数变换正反变换核以及与图像数据的关系，提出了不同单位根对应变换矩阵间的关系定理的推论，证明了该推论中模为奇素数的二维Fermat数变换的不同单位根对应的变换矩阵之间的关系，揭示了模为奇素数的二维Fermat数变换的本质，在构造离散图象数据Fermat数变换时为单位根的选择奠定了理论基础。

Tea, feed, gegen, fernery, malt, liriope, isatis root, apn, leigong root, houttuynia cordra, leonurus japonicus, lotus leaf and mulberry leaves, etc.

茶叶、饲料、葛根、蕨根、麦芽、麦冬、板兰根、穿心莲、雷公根、鱼腥草、益母草、荷叶、桑叶等等。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。