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From the point of view of geobotany, with the method of correlative factors of growth of plants, a countrywide theoretic ecological division was done for the introduction of Camptotheca acuminata and three kinds of areas of ecological preferent zone, ecological adaptive zone and ecological unadaptable zone were divided. With the theory of synecology, the characteristic on environment, constitution, life form spectrum, diversity, similarity of plots of communities were researched. Applying the method of species association, discrete distribution, indensity index, fractal geometry, etc. to research relations between the species of the communities, space distribution of Camptotheca acuminata, structure of age of Camptotheca acuminata, in different communities. Using the theories of autoecology, distibutons of seeds on land and growth of seedlings in vertical and horizontal directions, biomass of organ of Camptotheca acuminata were analyzed. On the opinions of conservation biology, the external and internal factors impressing Camptotheca acuminata were analyzed to research the mechanism of the endangered species, and with using of CTM Model, the future development direction of Camptotheca acuminata in different communities were forecasted, and. Standing on the position of resources ecology, discussing the regularity of camptothein in Camptotheca acuminata of different sites and seeding of different resources, also the the derive technics of camptothecin.

本文从地植物学的角度，运用植物生长相关因子法，对我国喜树资源的生态适宜区进行了划分，理论上确定了我国的喜树的引种栽培的最适生活区域、生态适宜区域和不适宜生活区域；从群落生态学的角度，对野生喜树所在的典型群落的群落环境、群落组成、群落生活型谱、群落的物种多样性特点、群落样地间相似性进行了研究；从种群生态学的角度，运用种间联结性、离散分布模型、聚集强度指数、分析几何等分析手段，对野生喜树所在典型群落间的种间关系、喜树的空间分布格局、年龄结构等进行了分析；从个体生态学的角度，对不同年龄组的喜树的种子的散落的垂直分布、水平分布、时间分布及种子发芽率和千里重等特点、不同种源的人工喜树苗期特点、喜树的高生长和茎生长特点、喜树的器官生物量特点进行了研究；从保护生物学的角度，对野生喜树的濒危的内部因素和外部因素进行了探讨，并运用CTM模型对不同群落中野生喜树的种群趋势进行了预测；从资源生态学的角度，对我国地理环境下喜树中喜树碱含量的地理分布规律、不同种源的喜树幼苗中喜树碱含量变化规律进行了研究，并对喜树碱的提取工艺进行了探讨。

Since this is very emergent,and it needs my preferent attention,i'll certainly consider it first.

雷锋同志把他的一切献给人民，给我们大家树立了一个好榜样。

In concordance with this suggestion, it has been shown that dendritic cells from mice that are resistant to infection with Listeria monocytogenes preferent

和谐这一建议，它已经表明，从小鼠树突状细胞的抗感染李斯特菌优先表达TLR9 ，连同树突状细胞的成熟标志CD40分子和CD86 ，并产生高水平的IL - 12的，而树突状细胞从易感小鼠强烈表示TLR2 ，-4 ，-5和-6 ，并产生大量的趋化蛋白-1 （刘等人。， 2002年）。

When you leave your data ,we can help you apply for a VIP.The next time you come will enjoy the preferent with your VIP,and you can accumulate points when you consume.

你留下资料后，我们可以为你申请一张会员卡，凭会员可以享受会员折扣，并且每次消费可以享受积分，积分在下次配镜时可以抵用现金。

We studyed on breaking dormant and screening preferent chemical herbicides of Codonposis Lanceolata Bentn.et Hook.f. in order to solve the low rate of germination and difficulty of weed control during the cultivation of Codonposis Lanceolata Bentn.et Hook.f..

为解决轮叶党参栽培过程中种子出苗率低及除草难的问题，对轮叶党参休眠的打破及适宜化学除草剂的筛选进行了探讨。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。