本文将分别以肯定回答和否定回答的角度来探讨arethese（复数形式）的问题。在这个全球化的时代，相互间的了解和交流显得格外重要。通过对这些问题的肯定与否定回答，我们可以更好地理解世界，促进共同发展。
一、肯定回答：
1. Are these digital devices useful?
With the rapid development of technology, digital devices have become an indispensable part of our daily lives. From smartphones and laptops to tablets and smartwatches, these digital devices have greatly facilitated our everyday tasks. They provide us with easy access to information, enhance communication, and increase productivity. Moreover, digital devices have also opened up new opportunities in terms of education, entertainment, and business. For example, e-learning platforms enable us to acquire knowledge anytime and anywhere, while streaming services allow us to enjoy a wide range of movies and music. Therefore, it is undeniable that these digital devices are indeed useful.
2. Are these international conferences beneficial?
In today's interconnected world, international conferences play a vital role in promoting global cooperation and understanding. These conferences bring together experts, scholars, and professionals from different countries and fields to exchange ideas, discuss important issues, and initiate collaborations. By sharing their insights and experiences, these conferences contribute to the advancement of knowledge and innovation. Additionally, international conferences often generate significant economic benefits for the host country, such as increased tourism and business opportunities. Furthermore, they provide a platform for countries to strengthen diplomatic relations and resolve conflicts through dialogue. Therefore, it can be concluded that these international conferences are highly beneficial.
二、否定回答：
1. Are these digital devices harmful?
While digital devices have undoubtedly brought numerous benefits, there are also potential drawbacks that we need to acknowledge. Excessive use of digital devices can lead to various health issues, such as eye strain, musculoskeletal problems, and sleep disturbances. Moreover, dependence on digital devices may hinder face-to-face interactions, resulting in social isolation and reduced emotional intelligence. In addition, the proliferation of digital media has raised concerns about privacy and security, as personal information can be easily accessed and exploited. Therefore, it is important to use these digital devices in moderation and take appropriate measures to protect our well-being and privacy.
2. Are these international conferences wasteful?
Although international conferences have their merits, critics argue that they can be wasteful and ineffective in achieving their intended goals. The high costs associated with organizing and attending these conferences, including travel expenses and accommodation, can place a burden on both participants and host countries. Moreover, there is often a lack of follow-up action or implementation of the ideas and resolutions discussed during these gatherings. Critics also point out that some conferences may serve as mere platforms for self-promotion rather than genuine knowledge exchange and problem-solving. Therefore, it is necessary to reevaluate the purpose and effectiveness of these international conferences and ensure that they are conducted in a cost-effective and result-oriented manner.
结语：通过对arethese问题的肯定与否定回答的探讨，我们可以看到事物的多面性。数字设备和国际会议都有其优点和局限性，我们应该充分利用其优势并采取措施来解决潜在的问题。在不断发展的世界中，求知和合作是推动各国共同发展的重要因素，我们应该以积极和开放的心态面对这些问题，并努力在日常生活和社会中做出明智的到。
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