引

AFLP marker technique was used to investigate the genetic relationships between 50 accessions of maize and its wild relatives including teosinte, Tripsacum and Coix With twenty one AFLP primer combinations of PstⅠ/MseⅠ, 641 AFLP amplified bands were obtained, including 586 polymorphic bands with an average of 30 52 per primer combination and the polymorphism percentage of 91 4% Cluster analysis using UPGMA method based on the data of AFLP showed that the 50 materials could be divided into...

用AFLP分子标记技术对 5 0个有代表性的玉米及其野生近缘种大刍草、摩擦禾、薏苡材料进行了遗传关系分析。利用 2 1个PstⅠ MseⅠ引物组合检出可辨认带共 6 4 1条，其中多态性带 5 86条，平均每对引物得到 30 5 2条多态性带，多态性 91 4 %。聚类分析结果表明，可以将 5 0个材料分为 3大类，与已有的玉米族分类一致，但与玉蜀黍属内的种间和种内分类存在差异，说明大刍草各种内存在较大的遗传多样性。本实验发现玉蜀黍属与摩擦禾关系比与薏苡的关系更近，但并没有发现玉米与小颖玉米亚种比与其他大刍草的遗传关系更近。

This electronic tide diagram is simple, convenient and practical. By the help of this diagram, mariners can easily find accurate tide height at any time of each tide station. It has a practical value to relax the mariners' work load and reduce errors that may arise to ensure the safety of navigation.keywords : paper "Tide Table" electronic tide diagram, shiphandling, pilotage

在上海港船舶引航实践中试用表明，该电子潮汐图表简单明了、方便实用、易于推广应用；借助该电子潮汐图表，船舶驾引人员可方便地查看每个潮位站任意时刻的精确潮高，对减轻船舶驾引人员工作负担，减少可能出现的差错，保障航行安全具有实用价值。

Genetic diversity among 7 populations of Trillium tschonoskii were analyzed by using inter SSR and amplified fragment length polymorphism molecular markers. The results were as follows:(1)ISSR: 12 out of the 100 primers showed consistent banding patterns and amplification, a total of 135 bands were produced with an arrange of 250-2500bp, 46 of which (34.07%) were polymorphic.

应用锚定SSR和限制性片段多态对7个延龄草居群的遗传多样性进行了分析，结果如下：从100个引物中筛选出12个ISSR引物，在250-2500bp之间共扩增出的135个条带，其中多态性带为46，占34.07％。

Methods:150 cases of spontaneous pneumothorax which were randomly collected since 1995 were devided into two groups.in group a thoracic close drainage plus lasting vacuum aspiration（0.5～1.5 kp） was applied by deep vein detained trochar in 65 cases.

将1995年以来随机抽取的150 例需进行胸腔闭式引流术治疗的自发性气胸患者分为两个治疗组。a组：65例使用深静脉留置套管针行胸腔闭式引流术加持续低负压（0.5～1.5 kpa）吸引治疗自发性气胸。b组：85例常规大导管组治疗自发性气胸。两组结果进行比较。

Keynesia is by obtain employment inadequacy cites significant demand insufficient, bring undercapitalize and consumptive inadequacy and even monetary inadequacy, formed what be weighed by people to be " flat economics system ".

凯恩斯是由就业不足引到有效需求不足、引到投资不足与消费不足乃至货币不足，构成了被人们称之为"萧条经济学体系"。

The paper introduces an underfeed winder control system mainly composed of Siemens S7-400 PLC, TP270 hand touch screen, 6SE70 AC converter. It successfully implements all AC drive control for the underfeed winder.

摘 要：介绍了由西门子S7-400 PLC、TP270触摸屏、6SE70变频器组成的下引纸复卷机的控制系统，通过公共直流母线系统和基于PROFIBUS-DP总线的分级控制的应用，实现了下引纸复卷机的全交流传动控制。

The Modern scholors generally regard Dayus watercontrol project as a legend instead of historic factBy the data of uranology,the author firstly demonstrates that there were quite a lot of natural disasters about 4000 years ago caused by the nine planets in the solar system moved into one line,and among these disasters ,floodwater was the most serious oneSecondly,with the new discoveries of the geographic and archaeological works...

现代学者多将大禹治水视为中国历史上的神话传说。本文先引天文资料证明距今4000年前后确因九星地心会聚引发了各种自然灾害。在这些灾变中，尤以洪水为大。再引地理、考古资料证明此次洪水在黄河下游地区实为距今4000年前后的黄河南北改道，而改道又加剧了洪水泛滥。然后勾稽历史文献，从典籍中寻求黄河改道的线索。

Aslo the paper has dealed with the mechanism of the hollow cathode vacuum arc discharge and analyzed the starting arc process according to the neutralizing theory of ionized gas.

根据电离气体中性化条件，初步探讨了在低气压下空心阴极电弧放电的引弧过程，分析了影响低气压下空心阴极电弧放电引弧电压的因

MAX706SCSA Pinout: These pins accept the 12 data inputs from a digital video port of a graphics controller.

MAX706SCSA引脚说明：这些引脚接受12从图形控制器的数字视频端口的数据输入。

Every course of studies must lead somewhere, i.e., to a bigger wage packet.

学生所修每门课程都须将所学者引向某个目标，即引向一个更为丰厚的工资袋。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐