The synthesis method of the invention is as follows: first, 5-amino-2-(p-aminophenyl)- benzoxazole and aliphatic diacid are respectively recrystallized; NMP is distilled; solubilizer is dried; second, in an atmosphere of nitrogen, after Py and NMP are mixed evenly and added to a sealed reactor, the solubilizer is added into the reactor, followed by the 5-amino-2-(p-aminophenyl)- benzoxazole, then the mixture in the reactor is stirred; second, in an atmosphere of nitrogen, the mixture in the second step is stirred and heated to 50-150 DEG C, then the aliphatic diacid is added, followed by TPP for condensation; fourth, after methanol is poured into the reactor, the sediment is separated out from the mixture, filtered, washed and dried, so the semi-aromatic polyamide containing oxazole ring is obtained.

本發(fā)明的合成方法如下：一日韩福利短片在线观看视频免费、分別重結(jié)晶5-氨基-2-苯并唑與脂肪族二酸亚洲中文在线播放一区；蒸餾NMP插入女人下面视频；干燥增溶劑免费的精油按摩毛片；二、在氮?dú)鈿夥障戮啡似抟磺那琍y與NMP混勻后加入密封的反應(yīng)器中人人操人人色人人看，再加入增溶劑，然后加入5-氨基-2-苯并唑国产精品黄色网站在线播放，攪拌97无码免费人妻超级碰碰砬；三、在氮?dú)鈿夥障屡访朗悠笛侵尥计瑢⒉襟E二的混合液攪拌并升溫至50℃～150℃后加入脂肪族二酸色久综合网精品，再加入TPP后縮聚；四欧美一级一A片免费观看交片、再傾入甲醇析出沉淀性视频一区二区在线，過濾，清洗沉淀www.日本com，再干燥色哟哟视频在线；即得到含唑環(huán)半芳香聚酰胺。

Keep in step now," she called out to her parading children."

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The first step is carried out by bringing the raw pulp into contact with a mixture of peracetic acid and performic acid.

通過使原紙漿與過乙酸和過甲酸的混合物接觸而進(jìn)行第一步国产一区二区狠干。

Calcium montmorillonite was prepared by purifying LeXi bentonite with wet method two times. After purification, sodium modification of Ca-M was studied. A series of Fe/Cr-pillared montmorillonites were prepared with conventional method using sodium montmorillonite as experimental materials, and synthesis condition of Fe/Cr-PILM was studied and optimized. In order to shorten the preparation cycle of PILM by overleaping the step of sodium modification of Ca-M, the pretreatment technique for Ca-M has been pointed out for the first time. A series of PILMs were prepared with hydrothermal method using pretreated Ca-M as starting materials, which show that pretreatment of Ca-M is feasible.

然后，本文以萊西膨潤土為原料欧美黑人粗暴交的一级视频，用二次濕法提純了-2μm的鈣基蒙脫石一级欧美牲交片无遮，對其進(jìn)行了鈉化改型研究；以改型后的鈉基蒙脫石為原料狠狠色色欲，新型的鐵小黄片毛片在线、鉻復(fù)合離子為柱化劑，研究并優(yōu)化了常規(guī)離子交換法制備PILM的工藝与子的性关系视频；為了簡化PILM的制備工藝国产吞精口爆一区二区，我們首次提出了蒙脫石的預(yù)處理工藝，希望通過預(yù)處理后可以省去蒙脫石的鈉化工藝国产S性爱视频，以Ca-M為原料直接合成PILM无码毛片视频一区二区99。

It is the main point to focus on the elucidating of the pathogenesis of PNC as a polygenetic inheritance tumor, primarily establishing of the concept of susceptibility gene groups in NPC and the carcinogenesis model of the multi-step Domino effect involved in the molecular mechanisms of NPC dominated by susceptibility gene groups in order to lay out a substantial foundation for finding the high-risk susceptibility factors of NPC, screening the high-risk population of NPC and exploring the targetic and individual measures in diagnosis and treatment of NPC.

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Through Hilbert transform, a signal's plane trace can be get. There are two frequencies in the tested signal, so the signal's plane trace may be looked as the track of the out pole's end when two poles rotate around parallel axles. Using the knowledge of motion synthesis in theory mechanics, a formula to describing the change of plane trace's step length and angle for two-frequency be get. So we may prolongate the tested signal's plane trace from the echo's initial arriving moment, and get a certain length of the signal's prolongation.

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Based on the above, the author built the vehicle virtual prototyping simulating model including the front and rear suspensions, the powertrain, the steering system, the front and rear tires, wrote the driver control files(abbreviation. dcf) and driver control data files(abbreviation. dcd) for vehicle handling stability simulation analyzing according to the requirements of the current standards GB/T6323.1-94-GB/T6323.6-94 of our nation"s for vehicle controllability and stability test, carried out simulation and analyses for vehicle handling stability such as steering wheel angle step input test, returnability test, steady static circular test, pylon course slalom test and steering efforts test, and evaluated the car"s handling stability performance by scoring according to GB/T 13047-91 ?Criterion thresholds and evaluation of controllability and stability for automobiles?.

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It is pointed out that:——Design should be a perfect scientific dicipline and the research about design methodology is an important step to scientize the design.

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