专升本背诵单词记不住？小心不要陷入这些误区2020年专升本考试，送你几个提高成绩的小妙招

英语是一门需要认真复习的学科，也是一门非常重要的课程。在准备考试时，许多学生会记住单词，但我们不应陷入这些误解。机械复制的效果只能持续几天，不能形成长期记忆。有时老师不得不抄写一个他不能听写或测试100次的单词，但最后他只记得抄写100次，但他不记得如何写这个单词。因为机械复制的时间很长，即使复制了一百次，它仍然会继续出错。写和读的能力取决于“标准汉语”

许多学生会写或不读，也依赖于“标准汉语”的方法。

这是一个非常坏的习惯，一些学生从初中甚至小学就继承了这个习惯。汉语和英语的发音有许多不同之处。这种方法很容易导致发音不准确，缺乏灵活性，无法独立学习单词。为了增加词汇量，有些学生翻开词典，把所有的生词都背下来。这种方式似乎非常可靠。但在这个阶段，我们最需要的是科学地积累词汇——构词法。有些学生没有之前提到的任何问题，但在把来之不易的词汇写在一本漂亮的书上之后，他们很少用来复习和做笔记。最后变成了形式主义，一开始只记过一次的话根本记不住了。因此有必要复习听写。在

2020年我如何在2020年提高我的成绩？让我们用编辑器来看看~

1。“不攀岩不攀比”的积极心理意蕴考察状态因人而异：依据不同，不宜攀比。

我们可以有问题，互相交流，我们可以互相学习。但如果有分歧，我们应该冷静下来，与自己的目标进行比较，而不是与其他童鞋甚至高级童鞋进行比较，增加不必要的心理负担。升级是人生的一次骄傲的经历，需要坚持不懈的智慧和信心。尤其是在最后两个月左右的冲刺阶段，保持积极的态度是每一个正确的姿势。

如果你在复习中遇到瓶颈，很难集中精力帮助别人。我们建议我们应该改变主意，让自己做一些放松的事情，比如去锻炼，听音乐，读励志故事，和老朋友聊天等等，这样不仅可以缓解压力，也可以帮助我们解开复习中的纠结，不是很好吗？

在复习中，他们会遇到“无助”的挫折，例如经常犯错误或未能按时完成计划，从而导致自我怀疑度低。这个时候我们应该给自己积极的心理暗示，及时调整自己的心态和策略，既不自卑，也不自大。健康是革命的资本。首先要养成良好的生活习惯，早睡早起，保证充足的睡眠。冲刺阶段当然很重要，但如果剩下的不好，就会影响精力，降低复习效率。我们必须有一个合理的生物钟，在日出日落时工作而不牺牲时间，提高效率才是王道。

按时吃三餐多吃豆类和肌肉纤维细密、脂肪含量低的白肉。大脑活动的营养来自食物。吃好喝得好能让我们储存能量，保持精力旺盛。不要为了挤出复习时间而勉强或不吃东西。经常锻炼，养成锻炼习惯。在

In 2011, Huangshi Institute of technology upgraded "mechanical design basis" examination outline

"mechanical design basis" course is an important technical basic course of mechanical specialty in higher engineering colleges. It plays a connecting role in the whole teaching plan as the main course, and has a very important position in the overall situation of training senior engineering and technical personnel, and has enhanced the mechanical technology The function of adaptability, development and creativity of surgical work. This course includes the basic working principle of mechanical design, the general working principle of mechanical design, the general working principle of mechanical design, the basic working method of mechanical analysis, the general working principle of mechanical design, and the application of mechanical analysis. Through the study of this course, students can be familiar with and master the basic knowledge, basic theory and basic skills of general parts and components. Preliminary ability to design and maintain general machinery. To lay a good foundation for further study of mechanical courses. 1. Master the basic knowledge of the main types, performance, characteristics, commonly used materials and applications of common mechanisms and mechanical parts;

2. Master the basic theories and methods such as the motion characteristics of mechanisms, the basic principles of mechanical dynamics, the working principles of mechanical parts, the design and calculation criteria of mechanical parts, and the simplified calculation;

3. Be able to comprehensively use various mechanical parts and various kinds of mechanical parts Knowledge of mechanism, master the ability to design mechanical transmission device and simple machinery. The basic requirements and key points and difficulties of the course content

(1) the motion diagram and degree of freedom of planar mechanism

[requirements] understand the composition and motion diagram of planar mechanism, master the calculation of the degree of freedom of planar mechanism

1. Understand the planar kinematic pair and its classification, and solve the constraints on the motion of the mechanism after introducing the kinematic pair. Understand the composition of planar mechanism and master the drawing of kinematic diagram. Master the calculation of degree of freedom of planar mechanism, and pay attention to the calculation of degree of freedom when there are composite hinge, local degree of freedom and virtual constraint.

[key points and difficulties] drawing of motion diagram of planar mechanism; calculation of degree of freedom.

[requirements] master the basic types and characteristics of planar linkage mechanism, and master the common design methods of planar four-bar mechanism. Understand the composition and application of planar linkage mechanism and its basic types and evolution. Master the basic characteristics and knowledge points of planar linkage mechanism (the condition of existence of crank, quick return characteristic, pressure angle, transmission angle and dead point position). Master the graphic design method of planar four-bar linkage (design four-bar mechanism according to given stroke speed ratio coefficient and four-bar mechanism according to given link position). In this paper, the basic types of the four-bar linkage are identified, the characteristics of the four-bar linkage are analyzed, and the graphic design of the four-bar linkage is presented.

[requirements] understand the type and application of cam mechanism and the common motion law of follower, master the profile curve of disc cam according to the given motion law. Understand the type and application of cam mechanism. Understand the common motion laws of follower (constant speed motion law, equal acceleration speed motion law, cosine acceleration motion law, sine acceleration motion law)

3. Master the graphic method to design the profile curve of disc cam according to the given motion law. Some problems should be paid attention to in designing cam mechanism (selection of base circle radius, pressure angle and rolling radius).

[key points and difficulties] according to the displacement line diagram, the contour curve of the disc cam with translating follower is designed and the pressure angle is checked.

[requirements] understand the type, characteristics and application of gear mechanism; be familiar with the properties of involute; master the parameters and geometric dimension calculation of involute cylindrical gear; understand the meshing principle and cutting principle of involute gear; clarify the concept of involute modified gear. Understand the characteristics and classification of gear transmission. The basic law of tooth profile meshing. The meshing property of involute and involute tooth profile. Master the name, geometric parameters and dimension calculation of each part of involute standard spur gear. Master the correct Meshing Conditions of cylindrical gears and involute gears. The method of cutting teeth, undercutting phenomenon and the least number of teeth of involute gear are discussed. Master the tooth profile surface, the relationship between normal surface parameters and end face parameters, geometric dimension calculation, equivalent number of teeth, advantages and disadvantages of standard helical cylindrical gear. Understand the tooth profile surface, back cone, equivalent number of teeth and geometric dimension of straight bevel gear, and calculate the characteristics and types of worm drive. Main parameters and geometric dimension calculation of worm drive

[key points and difficulties] meshing principle and geometric dimension calculation of involute standard spur gear; meshing characteristics and equivalent number of teeth of helical cylindrical gear.

[requirement] master the basic type of gear train and transmission ratio calculation. Understand the function and classification of gear train. Master the calculation of fixed axle gear train and its transmission ratio. Master the calculation of epicyclic gear train and its transmission ratio. Master the calculation of compound gear train and its transmission ratio.

[key points and difficulties] calculation of gear train transmission ratio

[requirements] understand the types and applications of threads and their main parameters, master the force analysis, efficiency and self-locking of thread pairs, and be familiar with strength design calculation. Understand the type, characteristics and selection of hub connection. Understand the formation, main parameters, types and application of thread. Understand the force analysis, efficiency and self-locking of thread pair. Understand the hub connection (key connection, interference fit connection, elastic ring connection, keyless connection and pin connection, in which the flat key connection and strength calculation are mainly introduced). Master the basic types and strength design calculation of screw connection (loose bolt connection, tight bolt connection under transverse load and tight bolt connection under axial load). [key and difficult points] main parameters of thread; strength design calculation

[requirements] type, structure and working characteristics of belt drive and chain drive; master selection calculation of V-belt drive and sleeve roller chain drive. Master the type and application of belt drive. Working characteristic analysis of belt drive (stress analysis, stress analysis, elastic sliding and slipping). Master the selection and calculation of V-belt transmission. Understand the type, structure and standardization of chain drive. The motion inhomogeneity of chain drive. Understand the selection and calculation of sleeve roller chain drive. Sleeve roller chain sprocket.

[key points and difficulties] analysis of working characteristics of belt drive; selection calculation of belt drive

[requirements] master the transmission material, failure mode, stress analysis and strength calculation of gear teeth of spur gear. Understand the helical cylindrical gear force analysis and tooth strength calculation. Master the failure mode and material of gear teeth. Strength calculation of spur gear (stress analysis, load calculation, tooth bending strength calculation and tooth surface contact strength calculation). Master the force analysis and strength calculation of helical cylindrical gear.

[key points and difficulties] transmission material, failure mode, stress analysis and strength calculation of gear teeth of spur gear.

[requirements] understand the type, characteristics, application and main geometric relations of worm drive; master the failure form, material selection, tooth stress analysis and strength calculation of worm drive; be familiar with efficiency, lubrication and thermal balance calculation of worm drive.

[key and difficult points] failure mode, material selection and force analysis of worm drive; parameter selection of worm drive.

[requirement] master the classification, structure and calculation of shaft diameter. The main types, structures, standards and selection of couplings and clutches. Understand the function, classification and material of the shaft. Master the structure design and strength calculation of shaft. Understand the type and application of coupling and clutch. The structure of several commonly used couplings and clutches.

[key and difficult] structural design and strength calculation of shaft

[requirements] understand and master the type, structure and characteristics of bearings. Master the check calculation of non liquid friction sliding bearing and selection calculation of radial ball bearing. Understand the main types, structures and materials of bearings. Master the checking calculation of non liquid friction sliding bearing. Master the type, characteristics, code and selection of rolling bearing. Rated life, rating, dynamic load and rated static load of rolling bearing.

[key and difficult points] rated life, rated dynamic load and rated static load of rolling bearing. total score: 100 points examination time: 120 minutes

analysis and calculation design questions about 55%

fundamentals of mechanical design edited by Yang Kezhen and Chen Guangyun, higher education press (5th Edition)

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