[解析]
（1）段落大意题。根据第二段It's a custom test room of about 18 m3，built from conductive aluminum panels with a metal pole running down the middle.When the scientists ran an electric current through the walls and pole following a set pattern，it produced two separate magnetic fields：one that fills the center of the room and the other that covers the corners，thus allowing any devices within the space to charge.（这是一个约18立方米的定制测试室，由导电铝板建造而成，中间有一根金属杆。当科学家们按照固定的模式，让电流穿过墙壁和电线杆时，它会产生两个独立的磁场：一个充满房间的中心，另一个覆盖房间的角落，从而使空间内的任何设备都能充电。）可知，第二段介绍了这个能帮所有设备充电的特殊房间的工作原理。故选C。
（2）细节理解题。根据第三段So the team built capacitors，devices that store electric energy，in the walls. "It limits the safe magnetic fields to the room volume （室容积） while limiting risky parts to all the components built in the walls." lead author Takuya Sasatani explains.（因此，研究小组在墙壁上建造了电容器，一种储存电能的装置。"它将安全磁场限制在房间内，同时将危险部分限制在墙壁内的所有组件内。"主要作者Takuya Sasatani解释道。）可知，电容器的功能是限制危险部件在墙内，而不出现在房间内，所以能起到保护人们免受伤害的作用。故选D。
（3）推理判断题。根据第四段"We're not saying this technology is safe under all circumstances — we're still exploring，" says study co﹣author Alanson Sample. "But it shows us that there's still much area to explore."（研究合著者Alanson Sample说："我们并不是说这项技术在任何情况下都是安全的，我们仍在探索中。"。"但它向我们表明，还有很多领域需要探索。"）可知，Alanson Sample对这项技术持谨慎的态度。故选B。
（4）推理判断题。根据最后一段"It's just too troublesome to put aluminum sheets all over the wall — that benefit doesn't make sense yet，" Sample says. "We've just developed a brand﹣new technique.Now we have to figure out how to make it practical." He plans to continue researching whether coating existing rooms with conductive material could enable the construction of wireless﹣charging rooms in line with building standards.Meanwhile，scientists hope to improve the efficiency of power conduction in the room and remove spots that the charge does not reach.（Sample说："把铝板贴满墙太麻烦了﹣﹣这种好处还没有意义。"。"我们刚刚开发出一种全新的技术。现在我们必须想办法使其实用化。"他计划继续研究用导电材料涂覆现有房间是否可以使无线充电室的建设符合建筑标准。与此同时，科学家们希望提高房间内的电力传导效率，并去除电荷无法到达的斑点。）可知，在测试房间里，墙壁上的导电铝板和房间中间的金属杆之间能在特定条件下产生磁场，但是把铝板贴满墙壁实在是太麻烦了，科学家们希望提高电力传导效率，可推出应用这项技术的最大障碍是材料。故选D。
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