英语四六级报名系统里面的照片可以修改吗？怎么修改？

同学你好，报名系统里面的照片应该是不可以换的，我大一时候用的就是那个照片，以后考试一直都是用的那个丑丑的照片，真的是没有办法呀，哈哈哈，祝你顺利通过考试吧，不要在意那些小细节啦！

英语ab级考试报名

据我所知，A，B级全称是高等学校英语应用能力考试A,B级，我有一张A级证，感觉没什么用，它连大学英语四六级都不如，所以又叫三级。
读大学时能考，出了大学就不行了。
但是你可以考全国英语等级考试和公共英语考试。社会考试考公共英语的还是蛮多的。

考研英语作文与六级作文有什么不同？

考研作文分两篇，一篇应用文，一篇一般是看图写作。而六级一般是essay,就是按中文提示的点来写，翻译要点加点连接词句，和四级差不多，只是对字数和句型要求更高。考研作文就完全不一样了，像第二篇大作文，只给一幅图，自己发挥，立意、写作自己完成。六级还停留在翻译为主的阶段。
不过作文是相同的，把考研作文书上的优秀作文好好分析，看看被人怎样运用连词，变换句型对六级作文还是很有帮助的。

毕业登记表上有一栏是 懂外语程度如何 应该怎么写？急

那要看你是什么毕业啦。如果本科或以上英语水平通过四级或六级以上。填这个就可以。如果是别的毕业没通英语等级考试那就填：一般或熟练

需要一篇关于 如何戒除网瘾的英语作文400字就行

Causes and symptoms
Causes
No one knows what causes a person to be addicted to the Internet, but there are several factors that have been proposed as contributing to Internet addiction. One theory concerns the mood-altering potential of behaviors related to process addictions. Just as a person addicted to shopping may feel a "rush" or pleasurable change in mood from the series of actions related to a spending spree— checking ones credit cards, driving to the mall, going into ones favorite store, etc.— the person with an Internet addiction may feel a similar "rush" from booting up their computer and going to their favorite web sites. In other words, some researchers think that there are chemical changes that occur in the body when someone is engaging in an addictive behavior. Furthermore, from a biological standpoint, there may be a combination of genes that make a person more susceptible to addictive behaviors, just as researchers have located genes that affect a persons susceptibility to alcohol.
In addition to having features of a process addiction, Internet use might be reinforced by pleasurable thoughts and feelings that occur while the person is using the Internet. Although researchers in the field of addiction studies question the concept of an "addictive personality" as such, it is possible that someone who has one addiction may be prone to become addicted to other substances or activities, including Internet use. People with such other mental disorders or symptoms as depression, feelings of isolation, stress, or anxiety, may "self-medicate" by using the Internet in the same way that some people use alcohol or drugs of abuse to self-medicate the symptoms of their mental disorder.
From a social or interpersonal standpoint, there may be familial factors prompting use of the Internet. For
People who develop problems with their Internet use may start off using the Internet on a casual basis and then progress to using the technology in dysfunctional ways. Use of the Internet may interfere with the persons social life, school work, or job-related tasks at work. Many of the treatments that have been used for Internet addiction have been modeled after other addiction treatment programs and support groups. (Oleg Nikishin/Getty Images. Reproduced by permission.)example, a person might "surf the Web" to escape family conflict. Another possibility is that social or peer dynamics might prompt excessive Internet use. Some affected persons may lack the social skills that would enable them to meet people in person rather than online. Peer behavior might also encourage Internet use if ones friends are using it. Modeling may play a role—users can witness and experience how others engage in Internet use and then replicate that behavior. The interactive aspects of the Internet, such as chat rooms, e-mail, and interactive games like Multi-User Dungeons and Dragons (MUDS), seem to be more likely to lead to Internet addiction than purely solitary web surfing.
One question that has not yet been answered concerning Internet addiction is whether it is a distinctive type of addiction or simply an instance of a new technology being used to support other addictions. For example, there are gambling casinos on the Internet that could reinforce a persons pre-existing gambling addiction. Similarly, someone addicted to shopping could transfer their addiction from the local mall to online stores. Persons addicted to certain forms of sexual behavior can visit pornography sites on the Internet or use chat rooms as a way to meet others who might be willing to participate in those forms of behavior. Researchers may need to determine whether there is such a disorder as "pure" Internet addiction.
Symptoms
One symptom of Internet addiction is excessive time devoted to Internet use. A person might have difficulty cutting down on his or her online time even when they are threatened with poor grades or loss of a job. There have been cases reported of college students failing courses because they would not take time off from Internet use to attend classes. Other symptoms of addiction may include lack of sleep, fatigue, declining grades or poor job performance, apathy, and racing thoughts. There may also be a decreased investment in social relationships and activities. A person may lie about how much time was spent online or deny that they have a problem. They may be irritable when offline, or angry toward anyone who questions their time on the Internet.
Demographics
In the past, people reported to have an Internet addiction disorder were stereotyped as young, introverted, socially awkward, computer-oriented males. While this stereotype may have been true in the past, the availability of computers and the increased ease of access to the Internet are quickly challenging this notion. As a result, problematic Internet use can be found in any age group, social class, racial or ethnic group, level of education and income, and gender.
Diagnosis
As previously noted, Internet addiction disorder has not yet been added as an official diagnosis to the DSM. The following, however, is a set of criteria for Internet addiction that has been proposed by addiction researchers. The criteria are based on the diagnostic standards for pathological gambling.
The patient must meet all of the following criteria:
He or she is preoccupied with the Internet (thinks about previous online activity or is anticipating the next online session).
He or she needs to spend longer and longer periods of time online in order to feel satisfied.
He or she has made unsuccessful efforts to control, cut back, or stop Internet use.
He or she is restless, moody, depressed, or irritable when attempting to cut down or stop Internet use.
He or she repeatedly stays online longer than he or she originally intended.
The person must meet at least one of the following criteria:
He or she has jeopardized or risked the loss of a significant relationship, job, educational or career opportunity because of Internet use.
He or she has lied to family members, a therapist, or others to conceal the extent of involvement with the Internet.
He or she uses the Internet as a way of escaping from problems or of relieving an unpleasant mood (such as feelings of helplessness, guilt, anxiety, or depression).
Treatments
Since Internet addiction disorder is a relatively new phenomenon, there is little research on the effectiveness of treatment procedures. Some professionals advocate abstinence from the Internet. Others argue that it may be unrealistic to have a person completely end all Internet use. As society becomes more and more dependent on computers for business transactions, educational programs, entertainment, and access to information as well as interpersonal communication, it will be difficult for a computer-literate person to avoid using the Internet. Learning how to use the Internet in moderation is often the main objective in therapy, in a way analogous to the way that people with eating disorders need to come to terms with food. Many of the procedures that have been used to treat Internet addiction have been modeled after other addiction treatment programs and support groups.
If a persons Internet addiction disorder has a biological dimension, then such medication as an antidepressant or anti-anxiety drug may help them with these aspects of the addiction. Psychological interventions may include such approaches as changing the environment to alter associations that have been made with Internet use, or decrease the reinforcement received from excessive Internet use. Psychological interventions may also help the person identify thoughts and feelings that trigger their use of the Internet. Interpersonal interventions may include such approaches as social skills training or coaching in communication skills. Family and couple therapy may be indicated if the user is turning to the Internet to escape from problems in these areas of life.
Relapsing into an addictive behavior is common for anyone dealing with addiction disorders. Recognizing and preparing for relapse is often a part of the treatment process. Identifying situations that would trigger excessive Internet use and generating ways to deal with these situations can greatly reduce the possibility of total relapse.
Prognosis
Although extensive studies have not yet been done, treatment appears to be effective in maintaining and changing the behavior of people drawn to excessive use of the Internet. If the disorder is left untreated, the person may experience an increased amount of conflict in his or her relationships. Excessive Internet use may jeopardize a persons employment or academic standing. In addition, such physical problems may develop as fatigue, carpal tunnel syndrome, back pain, and eyestrain.
Prevention
If a person knows that he or she has difficulty with other forms of addictive behavior, they should be cautious in exploring the types of application that are used on the Internet. In addition, it is important for people to engage in social activities outside the Internet. Finally, mental health workers should investigate ways in which to participate in the implementation of new technology rather than waiting for its aftereffects.
如果你要短一些的，只要看其中的Treatment 和prevention就行了

英语中“一感，二听，三让，四看，半帮助”的意思是什么？用法是什么？

1感，feel
2听，hear ,listen to
3 让，let ,make ,have
4看，see, look at ,watch, notice ,observe （其实是五看）
帮助 help
这些词都可以+宾语+宾语补足语。1感，2听，3 让，4看，这几个基本上都可以加上不定式、v-ing，v-ed形式做宾语补足语。
help sb (to) do sth. 其中的to 可以省略。

维持蛋白质一级、二级、三级、四级结构的作用力分别是什么？

1、蛋白质的一级结构
蛋白质的一级结构（primary structure）就是蛋白质多肽链中氨基酸残基的排列顺序（sequence），也是蛋白质最基本的结构。
它是由基因上遗传密码的排列顺序所决定的。各种氨基酸按遗传密码的顺序，通过肽键连接起来，成为多肽链，故肽键是蛋白质结构中的主键。
2、蛋白质的二级结构
指多肽链主链基团的局部空间排列，并不涉及氨基酸残基侧链的构象。蛋白质二级结构的形式包括α-螺旋、β-折叠、β-转角和无规则卷曲等。
α-螺旋和β-折叠为二级结构最常见的形式。α-螺旋为右手螺旋，每3．6个氨基酸残基螺旋上升一圈，每个氨基酸残基的高度为0．15nm，螺距为0．54nm；β-折叠又称β-片层，由两条以上肽链或一条肽链内的若干肽段平行排列折叠成的锯齿状结构，肽链可顺式或反式平行。
β-转角通常由4个氨基酸残基组成，第1个与第4个残基间可形成氢键。维持蛋白质二级结构各种形式的化学键是氢键。
3、蛋白质的三级结构  
指蛋白质分子在二级结构基础上进一步盘曲折叠所形成的空间结构，包括多肽链中所有基团的空间排布。
蛋白质三级结构的形成和稳定主要靠次级键(副键)，包括疏水作用力、离子键、氢键和范德华力等。蛋白质的三级结构由一级结构决定。一般来讲，只有一条多肽链构成的蛋白质具备了三级结构才能有生物活性。
4、蛋白质的四级结构  
两条或两条以上具有独立三级结构的多肽链通过非共价键缔合在一起所形成的空间结构，称为蛋白质的四级结构。四级结构中每条具有独立三级结构的多肽链称为亚基。
所以四级结构也就是亚基间的空间排布和相互作用关系。维持四级结构的作用力主要是疏水作用力、离子键、氢键和范德华力等次级键。 凡两个或两个以上亚基构成的蛋白质称为寡聚蛋白，寡聚蛋白必须具有四级结构才有生物活性。

扩展资料
蛋白质的组成：
蛋白质其组成基础是氨基酸。肽，是蛋白质水解的中间产物，同样肽键还是连接蛋白质中氨基酸之间物质，肽与蛋白质有千丝万屡的联系。要了解肽，就要深入了解蛋白质。
通常，从氨基酸的数目来看，把少于10个氨基酸分子形成的肽称为寡肽。其中，由两个氨基酸分子形成的肽称为二肽，相应的也就还有三肽、四肽、五肽等。
10～50个氨基酸形成的肽一般称为多肽，但实际上寡肽与多肽之间并无明确的氨基酸数目的区分。以含有51个氨基酸残基的胰岛素作为标准，由51个及以上数目氨基酸残基构成的多肽即成为蛋白质；但其实多肽与蛋白之间也无明确划分标准。
参考资料来源：百度百科-蛋白质结构

论文里面技术路线图用英语怎么说

论文里面技术路线图
Technical roadmap in the paper
论文里面技术路线图
Technical roadmap in the paper