【答案解析】[参考范文]

As an important force in the betterment of human life, technological development saves time and labor, reaches unexplored frontiers, and completes many former "missions impossible". For instance, computers and the Internet have made the world a smaller one. With a click of the mouse, a web camera and a microphone, friends are no longer kept apart by distance. In fact, modem people can hardly manage daily life, let alone a comfortable life, without sophisticated machines, apparatus and gadgets.
Unfortunately, for every problem, there is a solution and for every solution, there is a problem. It is unilateral to regard technology as a sole blessing, because it also exerts negative impacts. Take automobiles as an example. While offering people convenience, they emit toxic and greenhouse gases. Besides, when walking and cycling become luxuries, the lack of exercises accounts for many health problems among young and middle-aged people. So to some extent, technology is a curse that human beings bring on themselves.
Such is the paradox: technology is a double-edged sword. The proper use is certainly conducive to the productivity of modern life, but once we overuse, misuse or even abuse modern tech, we run the risk of hurting ourselves. So is technology a blessing or a curse? It all depends on how we use it.