选用

There were few successful examples of regioselectivity in reactions of unsymmetrically allylic derivatives, and enantioselectivities obtained with prochiral nucleophiles.

因而我们选用反应机理相对比较清楚的钯催化烯丙基取代反应来研究平面手性的作用。

Consequently, this essay choose the "Z-Score Model", which was developed by Altaian, the famous American expert in risks management, to analyze and evaluate the listed companies' credit risks in China and to verify its efficiency to Chinese stocks market. The " Z-Score Model" is an innovation in the evaluation of companies' credit risk in the United States' banks, which is now being used widely. If the model is also applicable in Chinese stocks market, it will be significant in both theories and practices.

因此，本文选用作为美国商业银行信用评估方法的一次重要创新的，目前仍被美国商业银行广泛使用的，由美国著名信用风险管理专家Altman建立的"Z评分模型"(Z-Score Model)来对我国上市公司的信用风险状况进行实证研究，验证其在我国股票市场的有效性程度，如果能证明"Z评分模型"同样适用于我国证券市场，并将其改造为更适合我国上市公司的信用风险分析模型，将不仅具有很大的理论价值，而且也具有十分重要的现实意义。

This paper introduces a system based on MCU 51 ultrasonic pulse reflection altimetry systems, therefore we choose to 80C51 or 89C51 altimeter on the objects.

摘 要：本文介绍了一种基于51系统单片机的脉冲反射式超声波测高系统，所以我们选用80C51或89C51进行对物体的测高。

In this paper, we decided to use a great potential for the development of the microwave method to prepare ultrafine alumina powder.

在本文中，我们决定选用有很大发展潜力的微波法来制备超细氧化铝粉体。

In order to study the behavior of fast pyrolysis of corn stalk powder, a set of fluidized bed with feed-in amounts of 5 kg/h was designed. 450, 475, 500 and 525℃ were adopted and aluminous soil was used as bed materials. The influence of reaction temperature on the collection rate of pyrolysis production was specially investigated.

在自行研制的一套进料量为5 kg/h流化床上，选用高铝矾土为流化床床料，选择450℃、475℃、500℃和525℃四个反应温度对玉米秸秆粉的快速热裂解规律进行了研究，主要考察了不同反应温度对热裂解产物收集率的影响。

This paper changed traditional process which used the coagulant of polymerization aluminum chloride procedure and selected aluminum sulfate as coagulant.

本文通过改变传统工艺中用聚合氯化铝做混凝剂的做法，选用硫酸铝做混凝剂，确定影响处理效果的因素，得出最佳实验条件。

The products use pure materials (aluminum hydroxide, hydrochloric acid) are made with advanced technology.

聚合氯化铝是一种新型高效的无机高分子混凝剂，本产品选用纯净原料以先进工艺制成。

If you are a college student or alumnus, you can probably get in touch with these materials.

当你需要专心工作，而周遭总是有繁杂的声音时，就可以选用这两种声音来加以遮蔽。

For this study, calcium carbonate was chosen because it is relatively insoluble in water and easily dissolved in dilute acid or ammonium chloride.

在本研究中选用了碳酸钙，因为它相对不溶于水，且易溶解于稀酸或氯化铵。

In this paper,the composition technics and technical requirement of cladding additives of ammonium nitrate are studied.

文章主要对包覆硝酸铵所选用材料的复合工艺及技术要求等进行研究。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。