reasons

摘要： To the Editor,Anosmia,which coupled with altered or loss of taste,during the current pandemic in individuals has heralded the onset of coronavirus disease 2019(COVID-19).The recovery from the anosmia has been seen to vary among individuals,which in some cases has been seen to take a protracted course.

摘要： In the design of the CAT 3408 engine, the Low Temperature (BT) circuits used to cool the engine lubricating oil and the charge air and the High Temperature (HT) circuits for cooling the cylinder liners, cylinder heads and body of turbofans are mainly used to cool the engine, so that it works properly. This work, based on the analysis carried out, to determine the lubrication compliance of the Yacco VX 100 - SAE 15 W-40 oil and that of the Camwater water used in the engine of the Boat Yang 1 by carrying out a series of conventional tests such as that: the density, the viscosity, the viscosity index, the flash point, the density, the sulphate center content, the water content, the total acidity index (TAN), total basic number (TBN) and pour point for the oil case and pH, hardness, sodium chloride content [NaCl], sodium sulphate content [NaSO4] for the water case which will be compared to the specified requirements to determine whether compliance is achieved for each of these characteristics. The results of the oil and water samples taken from the engine after use show that the used oil gives a specific gravity of 0.8822, a viscosity (at 40°C) of 92.29 mm2/s, a viscosity (at 100°C) of 13.99 mm2/s, a viscosity index (VI) of 155.39, a pour point -21°C, a Flash Point (VO) 215°C, a Sulfated ash content of 18%, a density 881.5 kg/m3, a total basic number (TBN) of 12.60 mgKOH/g, a Total Acid Index (TAN) of 3.096 mgKOH/g, a Water Content of 1.8 % and the water used gives a pH of 6.00, a hardness of 3.2 french degrees, a sodium chloride content [NaCl] of 0.468 mg/L, and a calcium sulphate content [CaSO4] of 2.38345 mg/L. the results of the water content and content of sulfated centers justify the thermal overload and power losses in the marine diesel engine CAT 3408 of the boat Yang 1 because of their values which are not in conformity with the standards.

摘要： Groups of people sometimes need to make decisions.Students might take a class vote on what book to read or game to play.Villagers might take a village vote to decide who will be their leader.But humans aren''t the only creatures on Earth who vote.Other animals,from honeybees to baboons,make group decisions.They just do it differently,and for different reasons.Instead of voting for a leader,animals vote on where to live or when to hunt.For years,scientists have studied animals''voting patterns and how these patterns affect group decisions.

摘要： With respect to the students,society,and knowledge development,the null curriculum is defined as the curriculum which is need for students to learn and at the same time contribute to the overall and harmonious development of the society,but it has been overlooked in the process of curriculum development intentionally or unintentionally.Its main types including ideology class null curriculum,value orientation class null curriculum,and vulnerable groups’class null curriculum.The formation of null curriculum is due to the ideological intervention,curriculum’s characteristics,and the limitation of the persons who developed the curriculum.The null curriculum provides beneficial reference and enlightenment for curriculum reform.

摘要： There are a lot of smokers in the world, yet most smokers are young people. It is said that about 45%of the smokers in the world from~①China. Believe it or not, the smokers are becoming younger and younger in China, even including some middle school students.There are a few reasons for this. Some people think smoking keeps themselves refreshed.Some people believe it is a kind of fashion and they want to be cool.

摘要： With the advancement of information technology and in the current development of the network society, the emerging network language, driven by strong language memes, continually derives and spreads. Based on memetics, the paper analyzes the memes phenomenon of Chinese network catchwords in 2018 and that it can be categorized into three forms. And it further explores the reasons for the popularity of network catchwords: simplicity, vividness, and defamiliarization.

摘要： With the rapid development of China and its frequent exchanges with the outside world,the importance of oral English has become more and more prominent.However,most high school students keep silent in English classes.It will not only lead to the emotional frustration of the teachers,but also impede the development of students’comprehensive abilities in English.So it is necessary to analyze the major reasons and find out some effective solutions.

摘要： With the promoting of world integration,the role of English listening and speaking is becoming more and more important.English listening is attached more importance to in higher education.Although many universities and college students take different measures to improve the students’English listening abilities,it is found that it is difficult to improve the students’English listening abilities effectively.This article will analyze the reasons of students’difficulty in improving their listening in the aim at discussing the measures to improve the students’listening effectively with other educators.

摘要： Nowadays cross-cultural communication plays a more and more important role.It is obvious that English teachers'' respon? sibility is to cultivate the students'' communicative ability in English teaching. But in communicationmany students have various kinds of problems of pragmatic failure. This article will focus on the study of pragmatic failure in term of verbal communication fail? ure, which mainly includes two kinds of pragmatic failures;one is pragmalinguistic failure and the other is sociopragmatic failure.

摘要： Why should surgeons study gut microbiota and microbiome(totality of body''s microorganisms and genomes)?There are at least three reasons.

摘要： 本发明提供一种交换芯片基于cpureasonid实现CoPP的方法和装置，该方法包括：在将报文上送CPU时赋予相应的cpureasonid，以用于上层协议栈区分具体的协议报文类型；为所有的cpureasonid映射一个exceptionIndex，并携带exceptionEn等于1的flag，exceptionEn用于标识报文在fwd模块是否需要复制上送CPU；在入口方向对携带exceptionEn等于1的flag的报文，根据其具体的exceptionIndex作为索引查找对应的CoppCtl表项获取限速Ptr；根据Ptr找到预设的Copp限速模块，Copp限速模块对接收到的报文进行处理，其中，所述Copp限速模块采用pps的单令牌桶模式，通过定时刷新令牌，来控制报文的转发和上送。