[您好我急需一个简单动态网页制作成品用于交作业而已不做商]第一题什么概念啊？用session判断？哎。。我学Java 的 给你讲下大概的思路吧。1、先在session中存入一个用户名和密码，然后通过session的getattribute方法得到里面的值进行判断。...+阅读

中文

科学技术的发展直接推动了人类社会的发展，人类的不断进步与科技的发展是密切相关的.人类生活的改善，由蒸汽时代进入了电器时代，与科学技术是万万相关的，虽然环境的不断恶化，但是科学技术的发展的速度大于人类对世界的破坏速度，这也就是人类能够一直维持下去的关键，所以，没有科学技术的发展就没有人类的今天的幸福生活.

英文翻译

Science and technology directly promotes human and social development, so human progress and technology development are closely related. The improvement of human life, from the era of steam into the electrical age, and science and technology are totally relevant, although the continuing deterioration of the environment, science and technology development speed the world is bigger than the destruction of human speed, which is mankind has been able to sustain the key, therefore, without the development of science and technology of today, human beings can not live so happily.