试题库在线考试题库-历年真题模拟试题及答案-考博英语在线试题测试中心-希赛网

题库

首页 > 题库 > 考博英语

My old school friends are scattered far and（）now.

A dentist may decide to（）the tooth to prevent recurrent trouble.

He might have（）pressure to save his position.

Be sure to（）an enclosed shelter, especially if you intend to build a fire in it.

Few people believed that the Empire could continue unchanged after the（）of the war.

We felt as if half the people in town were（）our lives.

Nissan has unveiled its super-quiet, zero（）electric car technology, a key design for the company.

The solution is grossly oversimplified and is（）with your generally realistic attitude.

There are volumes of work examining how couples and families（）conflict, but very few studies examining them having fun and laughing together.

（） is piling up that as men do more of the caregiving, violence against women falls.

We do need help from others, but we’ll never（）others for support.

They had to（）their failure to a lack of preparation.

The new secretary will（）us of some of the paperwork.

Obviously, we demonstrate that this feed additive has had a（）effectiveness to increase the rate of egg production.

In my opinion, she left the letter there（）so that you’d see it.

2.虽然网络类型的划分标准各种各样，但是从地理范围划分是一种大家都认可的通用网络划分标准。按这种标准可以把各种网络类型划分为局域网、城域网、广域网和互联网四种。局域网（Local Area Network，LAN）通常我们常见的“LAN”就是指局域网，这是我们最常见、应用最广的一种网络。局域网随着整个计算机网络技术的发展和提高得到了充分的应用和普及，几乎每个单位都有自己的局域网，甚至有的家庭中都有自己的小型局域网。很明显，所谓局域网，就是在局部地区范围内的网络，它所覆盖的地区范围较小。局域网在计算机数量配置上没有太多的限制，少的可以只有两台，多的可达几百台。城域网（Metropolitan Area Network，MAN）这种网络一般来说是在一个城市，不在同一地理小区范围内的计算机互联。这种网络的连接距离可以在10~100公里，它采用的是IEEE 802.6标准。城域网多采用ATM技术做骨网。ATM是一种用于数据、语音、视频以及多媒体应用程序的高速网络传输方法。ATM包括一个接口和一个协议，该协议能够在一个常规的传输信道上，在比特率不变及变化的通信量之间进行切换。广域网（Wide Area Network，WAN）这种网络也称为远程网，所覆盖的范围比城域网（MAN）更广，它一般是在不同城市之间的LAN或者MAN网络互联，地理范围可从几百公里到几千公里。

2. Many recent models in software engineering introduced deep neural models based on the Transformer architecture or use transformer based Pre-trained Language Models (PLM) trained on code. Although these models achieve the state of the arts results in many downstream tasks such as code summarization and bug detection, they are based on Transformer and PLM, which are mainly studied in the Natural Language Processing (NLP) field. The current studies rely on the reasoning and practices from NLP for these models in code, despite the differences between natural languages and programming languages. There is also limited literature on explaining how code is modeled.Here, we investigate the attention behavior of PLM on code and compare it with natural language. We pre-trained BERT, a Transformer based PLM, on code and explored what kind of information it learns, both semantic and syntactic. We run several experiments to analyze the attention values of code constructs on each other and what BERT learns in each layer. Our analyses show that BERT pays more attention to syntactic entities, specifically identifiers and separators, in contrast to the most attended token [CLS] in NLP. This observation motivated us to leverage identifiers to represent the code sequence instead of the [CLS] token when used for code clone detection. Our results show that employing embeddings from identifiers increases the performance of BERT by 605% and 4% F1-score in its lower layers and the upper layers, respectively. When identifiers’ embeddings are used in CodeBERT, a code-based PLM, the performance is improved by 21%-24% in the Fl-score of clone detection. The findings can benefit the research community by using code-specific representations instead of applying the common embeddings used in NLP, and open new directions for developing smaller models with similar performance.

Directions: Write an essay of about 250 to 300 words on the topic “Qualities of Labor and Society Development” according to the idea given below in Chinese. Write your essay on Answer Sheet II clearly and neatly.据媒体报道，国内某高校教学人员去年底宣布基因编辑（gene-editing）婴儿诞生。该研究对双胞胎胚胎体（twin embryos）的一个基因经过修改（modification），使她们出生后即能天然抵抗艾滋病，是世界首例免疫艾滋病（immunization against AIDS）的基因编辑婴儿。研究者坚持认，其研究目的并不是治疗或者防止遗传性疾病，而是要尽力保留有少数人才具有的特征，即天然抵抗某些艾滋病毒。但消息一发出就引发公众对该项研究的安全性与伦理性的和法律层面的激烈争议和深思。这是现代科学发展中科学研究兴趣和技术与人类的基本伦理原则、道德理念和社会法律构架相悖的案例。请你结合自己的专业学术历程谈谈你对这个问题的分析和看法。

现在全球面临的问题是我们的经济一直坚持的是一种短视的做法，尽可能低廉地生产和消费产品，这会形成一种基于快速使用，丢弃和更新的线性经济模式。要保持这种经济模式，就需要取之不尽，唾手可得的资源，同时有无穷无尽的废品安置场所，这显然是不可能的。为了找到一个可持续的替代方式，我们只需向自然界学习，因为在自然界，所有的一切都被充分利用。例如森林里物种的生活周期与四季更迭完美协调。这保证了一定程度上的生命复原力和持续力。我们的经济生活也应该努力效仿，构建循环性的经济体系。

Ideally, people would like to know when an earthquake is going to happen and how bad it will be. People have long believed that earthquakes can be forecast. In Japan, scientists have wired the Earth and sea to detect movements. The Chinese have traditionally watched animals and plants for warning signs of earthquakes. (1) Certain birds, like pigeons, also seemed to be especially noisy, and were reported to be flying in unusual patterns before the earthquake. Perhaps most interesting, and most easily measured, is a chemical change in ground water before a quake. Experimental data seem to indicate that the amount of radon (氡) in the water under the surface of the Earth waxes before an earthquake.Every family needs to have earthquake emergency plans. How will family members leave the area during the chaos following and earthquake? Everyone should agree on a meeting point outside the area—perhaps in a town several miles away. (2) Also important is an arrangement for family member to communicate if there is an earthquake in case that an earthquake happens in a large city, many of the telephone lines within the city are likely to be down. The few remaining working lines will be busy with the calls that naturally occur after a disaster and it will be difficult to call from one part of the city to another. It might, however, be possible to call outside the city. (3) A sensible arrangement is to have all of the members of the family call to check in with a friend or relative who lives more than a hundred miles away.(4) Although scientists still cannot predict earthquakes, they are learning a great deal about how the large plates in the earth’s crust move, the stresses between plates, how earthquakes work, and the general probability that a given place will have an earthquake. Someday soon it may actually become possible to predict earthquakes with accuracy. (5) However, even if prediction becomes possible, people who live in areas where earthquakes are a common occurrence will still have to do their best to prevent disasters by building structures that are resistant to ground movement and by being personally prepared. These precautions can make a great difference in saving lives and preventing the loss of homes. Education concerning bow to survive an earthquake should be a major emphasis for all government programs and earthquake-related research projects.

暂未登录

学员用户尊享特权

老师批改作业做题助教答疑学员专用题库高频考点梳理

上一页 4 5 6 7 8 9 下一页