完形填空

      The concept of solitude(独处) in the digital world is almost non­existent. In the world of digital technology, e­mail,social networking and online video games, information is meant to be 1. Solitude can be hard to discover 2it has been given up. In this respect，new technologies have3 our culture.

       The desire to be connected has brought solitude to a(n) 4 as we've known it. People have become so 5in the world of networks and connections that one can often be contacted 6they'd rather not be. Today we can talk, text, e­mail, chat and blog (写博客), not only from our 7， but from our mobile phones as well.

         Most developed nations have become 8on digital technology simply because they've grown accustomed to it, and atthis point not 9 it would make them an outsider. 10， many jobs and careers require people to be 11.From this point of view, technology has changed the culture of work. Being reachable might feel like a 12 to those who may not want to be ableto be contacted at all times.

 I suppose the positive side is that solitude is still possible for anyone who13 wants it. Computers can be shut 14andmobile phones can be turned off. The ability to be “connected” and “on” hasmany 15， as well asdisadvantages. Travelers have ended up 16on mountains, and mobilephones have saved countless lives. They can also make people feel 17and forced to answer unwanted calls or 18 to unwanted texts.

         Attitudes towards our connectedness as asociety 19across generations. Some find today's technology a gift.Others consider it a curse. Regardless of anyone's view on the subject, it'shard to imagine what life would be like20daily advancements intechnology.

如图所示为探究磁场对电流的作用的实验装置，闭合开关，观察到直导线AB运动起来，说明磁对电流有力的作用，将磁体两极对调，观察直导线AB的运动方向，这是为了探究力的方向与 ____关系，实验中选用铝导线而不用铜导线是因为铝的 ____较小；将电路中的电源换成灵敏电流计并将滑动变阻器的接入电阻调到最小，可用来探究 ____产生的条件．

计算：$lg5·{\log }_{\sqrt{10}}20+{\left(lg{2}^{\sqrt{2}}\right)}^2+e^{\ln \mathrm{\pi }}$=____