Which of the following statements best represents the position expressed in the article?
A．If we're not careful, technology will ruin our lives.
B．Technology is the key to the world's future economic development.
C．Technological change may not always be a good thing.
D．Some benefit from technology more than others.

未分类题2013年10月，复旦大学研发出利用LED灯无线上网的Lifi，其最高单线传 输速率达到3.7Gbps。现假设在其理想状态下，通过该网络传输10000张图片 作品(1024×768,32位真彩色),大概需要的时间是( )。A、10 sB、 60 sC、1 sD、 600 s

未分类题The third paragraph tells us that higher levels of education______.A．can prevent Alzheimer'sB．are related to greater mental awareness in youthC．are related to lower levels of mental decline in old ageD．is only one of many factors that can slow the rate of mental decline

未分类题In this text the authors main intent is to______.A．underscore the difficulties related to agingB．critique different theories of mental decline in old ageC．argue that old age need not be a barrier to great accomplishmentsD．understand how people can counter the impacts of aging on mental faculties

未分类题It is indicated in the first two paragraphs that______.A．the debt proportion in GDP of emerging economies is much higher than that of advanced economiesB．all advanced economies are facing low growth and high unemployment caused by the financial crisisC．public finances are a reflection of the difference in growth rate between emerging and advanced economiesD．economic crisis is less severe and interrelated now than before

未分类题The underlined word 'volatility' in Paragraph 2 refers to______.A．stabilityB．fluctuationC．surgingD．filling