选择反应

Results show that ascorbic acid and dehydroascorbic acid of cloudy strawberry juice in the storage process are unstable to the heat treatment; the degradation of ascorbic acid and dehydroascorbic acid accords with first-order dynamic, which indicates that this degeneration dynamic model is logical and effective, and can be used in selection of storing temperature and prediction of storage period at different temperatures.

结果表明：草莓浑浊汁在贮藏过程中还原型维生素C和氧化型维生素C对热不稳定，还原型维生素C和氧化型维生素C降解符合一级反应动力学。经过验证表明该降解动力学模型有效，可用于草莓浑浊汁贮藏温度的选择和预测不同温度下的贮藏期。

First, selective oxidative dehydrogenation of ethylbenzene was discussed.

首先探讨了乙苯的选择氧化脱氢反应。

Based on reviewing of functionalization of saturated carbon by catalytic oxidation with metalloporphyrins and metal phthalocyanines as a mimic of the enzyme cytochrome P-450, two reaction systems of which one was the preparation of 4, 4'-dinitrostilbene-2, 2'-disulfonic acid from 4-nitrotoluene2-sulfonic acid and the other was the preparation of 4, 4'-bis (dimethylamino -diphenyl) phenylmethanol from 4, 4'-bis (dimethylamino-diphenyl) phenyl methane , were specifically studied as carfunctionalization and oxyfunctionalization of saturated carbon.

本文在全面综述金属卟啉和金属酞菁类模拟细胞色素P-450酶催化剂催化氧化饱和碳原子功能化的基础上，选择由4-硝基甲苯-2-磺酸制取4，4'-二硝基二苯乙烯-2，2'-二磺酸和由4，4'-二苯基甲烷制取4，4'-二苯基甲醇两个反应体系进行饱和碳原子碳功能化和氧功能化的具体研究。

Methods 151 cars used for different periods of time were selected and the concentrations of formaldehyde,benzene,toluene,dimethylbenzene and TVOC were detected.

方法选择使用不同年限的151辆小汽车，分别测定车厢空气中甲醛、苯、甲苯、二甲苯、TVOC的浓度，同时对驾驶人员的不良反应进行调查。

Methods The levels of formaldehyde, benzene, toluene and dimethylbenzene indoors at different time after decoration were determined with methods described in GB11737 and the dwellers' adverse reaction with a given questionnaire was surveyed????

选择装饰竣工后不同时期的居室，分别测定室内空气中甲醛、苯、甲苯、二甲苯的浓度，同时对居留者的不良反应进行调查。

According to the condition of the dispase and alkaline proteinase, we combine the two enzymes so as to get the most optimization method to improve the yield of dissolvable peptide.

通过对单酶水解条件的摸索，将选择的两种酶以适当的比例混合，并且通过控制反应条件，提高蛋清蛋白的水解度和可溶性肽的得率，从而研制出一种适合蛋清白蛋白水解的复合酶。

Obviously, if we buy ascriptionalism, we will agree that the editorial judgment we impose on Jones' reactions to Smith -"Jones believes Smith is angry" exhausts what can be said about Jones' doxastic state.

显然，如果我们选择归属论，我们会同意说，这个针对张三对李四的反应的editorial判断——&张三相信李四生气了&——已经说尽了关于张三的信念事态。

The results show that under the follow conditions: pyrolysis temperature 270癈,active carbon and: ethyne black=9:l, carbon pretreated with HNOs, 7.18% Mn(NO3)2(vs. carbon support) catalyst can exhibit the best performance. In order to improve the electrocatalystic performance of MnO2, Pb(CH3COO)2 , La(NO3)3-6H2O and Ce(NO3)3-6H2O are chosen as additives of MnCVC air electrode . Electrochemical performance of the electrodes is studied by current-potential polarization curves.

为了提高催化剂的性能，选择了醋酸铅、稀土作为添加剂，采用稳态极化和交流阻抗测试方法，结果表明：铅的氧化物、稀土La和Ce可作为MnO_2催化剂的助剂来促进氧气还原反应的进行，醋酸铅添加7.5％时极化最小，在一般金属-空气电池的工作电流密度20～50mA／cm~(-2)下，电位比单独MnO_2催化剂可提升30～50mV。

What on earth should be the reaction of those taking risks for us every day - whether they are fighting on distant battlefields, performing exfiltration operations deep behind enemy lines, carrying out strikes with unmanned aerial vehicles, interrogating or detaining unlawful enemy combatants, countering terrorists inside the United States or making hard choices about the policies and rules of engagement governing such activities?

究竟我们要对那些每天对我们产生危险的情况做出什么样的反应---他们是否在远方的战场作战，正从敌人后方撤出，使用无人驾驶飞行器执行打击任务，审讯并逮捕敌人非法战斗人员，在国内打击恐怖主义人员或对管理这些活动的政策和措施做出艰难的选择？

By considering efficiency and cost, the optimal operating conditions were chosen as: reaction temperature 60℃, reaction time 3 h, and concentration of formic acid 88%.

综合考虑分离效果和成本，选择最佳反应温度为60℃，处理时间为3h，甲酸浓度为88%。

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％。