标签：话题作文 话题 英语四级作文
字数：1500字
提要：We Need to Broaden Our Knowledge1. 科学技术是社会发展所不可缺少的。2. 社会科学和自然科学相互渗透。3. 现代大学生需要广博的知识Our modern civilization is mainly attributed to the achievements of science and technolagy. With the broadening of human knowledge, We know more and more about the world we are living in. Human beings use their knowledge to change the environment, utilize the natural resourc..