As a result of analysis to many of the results of experiment, checked up on specimens, field investigation and combining with the theories of palaeobotany, comparative morphology, evolutional morphology of vascular plants and taxonomy, it can be concluded as following: the primitive sorts of Cycadaceae are the sorts that pinnate leafs are dichotomy; among these, the sort that pinnate leafs are tripinnate-dichotomy is most primitive, from this sort gradually evolve to bipinnate-dichotomy, to only for monopinnate-dichotomy, from this sort evolve to the sorts that pinnate leafs are simply pinna; among the sorts of simply pinna, the species that segments of megasporophyll possess much more triplicate to monodichotomy are most primitive.

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The morphology of scaffolds shows a regular morphology at high molecular weight. Furthermore, pore size was increased with high phase separation temperature, long coarsening time, and high concentration of nonsolvent.

反之在沒(méi)有非溶劑的存在下(100/0二氧陸環(huán)/水)，高分子溶液系統(tǒng)僅會(huì)出現(xiàn)固-液相分離91精品国产综合久久小仙女，顯示聚乳酸與二氧陸環(huán)是互溶性佳且穩(wěn)定的溶液系統(tǒng)亚洲Av人妻无码天堂。

Based on the results of morphology taxonomy and themain distribution regions of Lepidium in China, these resuls that the ideal regions forintroduction mainly lay in the northeast and north of China by GRGs were basically IIconsistent with the main native distribution regions of fifteen plants of Lepidium in China.Especially the native distribution regions of L.sativum that had the nearest kinships withMaca by morphology taxonomy were totally layouted as the ideal regions for introduction.

通過(guò)灰色關(guān)聯(lián)度分析所得的適宜引種區(qū)和較適宜引種區(qū)主要分布在東北、華北地區(qū)的結(jié)果與 15 種獨(dú)行菜植物在中國(guó)的主要分布區(qū)基本一致一级特黄AAAAA片免费观看，尤其是與瑪咖相似性非常接近的家獨(dú)行菜欧美性爱自拍小视频，它的分布地區(qū)皆被劃分為瑪咖的適宜引種區(qū)。

The current study takes modern Mandarin as its research subject, and using the basic definitions of morphology provided in O'Grady and Dobrovolsky's book, focuses its discussion on the special characteristics of Chinese words with respect to morphology.

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The reasons for the formation of octahedral crystal morphology and the influencing factors of the particle size and morphology are also discussed.

簡(jiǎn)要分析了形成八面體形貌的原因及各因素對(duì)粉末形貌與粒度的影響黄色免费强奸视频网站。

Therefore, the morphology of the etch pits can be predicted, or conversely the orientation of surface can readily be determined from the morphology of etch pits.

指出：利用這一點(diǎn),2021国产一级黄色视频，在已知晶面的晶格對(duì)稱(chēng)性的情況下，可預(yù)料蝕坑的形狀夜夜大片网；或反過(guò)來(lái)AV三级在线观看网址，從蝕坑的形態(tài)可很容易判斷其所在晶面的取向。

Pollen morphology of the Chinese monotypic genus Dichotomanthes and its out-group Prinsepia utilis were investigated from the point of view of pollen development. The SEM observation revealed that there is not any change in morphology and sculpture of pollen grains from the young pollen grain seperated from callose of tetraspore to the mature pollen grain in Dichotomanthes tristaniaecarpa. Only the volume of pollen grain increased with maturity.

從發(fā)育的角度研究了中國(guó)特有單種屬Dichotomanthes Kurz及與其系統(tǒng)學(xué)研究有關(guān)的外類(lèi)群Prinsepia utilis的花粉形態(tài)欧美国精品亚洲精品日韩专区，掃描電鏡觀察顯示Dichotomanthes花粉粒自脫離四分體胼胝質(zhì)膜開(kāi)始至成熟二核花粉粒不同發(fā)育時(shí)期欧美性性享受在线，花粉形態(tài)和外壁紋飾未見(jiàn)變化，僅花粉體積隨成熟度增加而有所增大欧欧美一级清。

Further theoretical analysis indicate that, the morphology of twin-crystals show straight parallel stripes, and the morphology of stacking-faults often show parallel stripes with an angle of 60° or 120°.

進(jìn)一步的理論分析表明AAA黄片一级二级三级，孿晶的形貌表現(xiàn)為平行條紋，而層錯(cuò)則通常為帶有60°或120°折角的條紋免费人成网站视频观看点击进入。

Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.

目的 探討卵細(xì)胞第一極體形態(tài)與原核期受精卵形態(tài)呦精品www在线播放、卵裂期胚胎質(zhì)量的關(guān)系。

Based on the observation of atomic force microscopy, the etching morphology of faces and sections with different crystallographic significance on α-quartz has been studied. The etching morphology on the natural crystal faces hexagonal prism faces (1010 and 01(average10, rhombohedron positive form face 10(average11, rhombohedron negative form face 01(average11 and the sections between any of the two crystal faces has been observed. It is shown that the etching pit on the same simple form has the same shape, while the orientation of the etching pits can be different. Different simple forms have different shapes of etching pits and the shapes of etching pits on positive form and negative form of the same simple form are also different.

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