1) nodus and resistance
难点与阻力
2) focuses and difficulties
重点与难点
1.
The‘Practice of International Trade’is a subject specialized in studying the international exchange of commodities, It is a comprehensive applied science with substantial content And this thesis analysis the practical significance of studying this subject as well as the learning methods, the focuses and difficultie
本文对学习本课程的现实意义、学习方法及部分重点与难点 ,结合教学实践进行粗浅的探析。
4) difficulty points and characteristics
难点与特点
1.
Research conclusions:Based on the difficulty points and characteristics of underground pipelines detection,the analyses of the influencing factors on the underground pipelines detection for railway are made,and the countermeasures and resolution to improving the detection quality of underground pipeline for railway are offered.
研究结论:针对地下管线探测难点与特点,分析影响铁路地下管线探测工作的影响因素。
5) requirements and difficulty
要求与难点
6) problems and difficulties
问题与难点
1.
In accordance with the present characteristics and development of market,the paper focused on analysis of the present situation and the existed problems and difficulties in the production of agricultural products of Zhejiang province,some tactics for developing the production of high quality agricultural products were suggested.
本文针对当前的市场特点及发展趋势 ,分析了浙江省农产品生产现状以及面临的主要问题与难点 ,提出了发展优质农产品生产的对策与建
补充资料：肺循环阻力(或全肺阻力)
肺循环阻力(或全肺阻力)
pulmonary circulation resistance
血液在肺部血管内流动时和血管壁之间的摩擦力和血液内部的摩擦阻力。肺动脉管壁较薄，分支短而管径大，故肺动脉的可扩性较大，对血流的阻力很小，仅0.12PRU(外周阻力单位)。肺循环动脉部分总的阻力和静脉部分总的阻力相等，故血液流动时在动脉部分的压力降落和静脉部分的压力降落相等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条