请你用图中的器材，测出额定电压为2.5V的小灯泡的额定功率，按要求完成下面各题：

单车共享

    ①现如今，城市人在选择出行工具时颇费思量，私家车自由但相对价格高，公交巴士地铁便宜但自由度低，还有从地铁站到家或公司“最后一公里”的麻烦，而共享单车有其优势。近来，一款颇具设计感的小橙车共享“摩拜单车”出现在很多城市的街头，成为朋友圈热刷的对象。

    ②单车共享作为分享经济的一种模式，其实在国内并不是新鲜事。成立于2014年，覆盖全国众多高校的ofo单车共享平台瞄准了闲置单车资源，将校园内废弃的单车与学生捐赠的单车经过改装机器锁、号码牌、涂装颜色后投放市场。这种不卖产品而是卖产品“使用”的经营模式，国际上对此有个专用名词，叫“产品服务系统”或者叫做服务型制造业，即充分利用资源，分时段供需要的人使用。

    ③与ofo单车不同，摩拜单车采用自行设计、自行生产的模式。据摩拜单车创始人胡玮炜介绍，因为希望打造4年免修的特殊自行车，摩拜走了一条自行设计、生产单车的路线，增强了产品的自主性，也提高了经营成本。为了避免“掉链子”，摩拜单车采用车轴转动、实心车胎、五辐轮毂、座椅高度固定的设计，单车重达25公斤，但这样一来，4年免修的愿景与上佳的骑行体验难以两全。

    ④摩拜单车成了共享单车的“新宠”，但在迅速扩张中也面临诸多问题。去年9月摩拜进入北京后，北京的五环内都能见到摩拜单车的身影，但因人流运动带来的“潮汐效应”导致上班时大量车辆集中在写字楼附近，下班需要用车时，大量单车又集中在地铁口附近，想骑车的人吐槽“无车可用”。

    ⑤如今上海地区摩拜单车的投放已超过1万辆。据不完全统计，投放一个多月，遭到人为破坏的单车超过了10%，有的车上的二维码被损坏，车身被贴了小广告。有用户为独占资源给车再加锁，有的甚至图自己方便将单车搬进了办公室或家里。

    ⑥从目前的情况看，摩拜单车想跑赢“最后一公里”要走的路还很长。

    I spent last summer volunteering at a hospital.It was a gift to 1so many amazing people and I'd like to share one of these moments.One day，I was called to a room where a(n)2woman was staying. Usually I helped with3who were ready to leave.Instead，she 4to go to the gift shop.I got a 5，helped her into it，and headed down to the entrance.

    When we got there，it wasn't open yet.After a 30-minute 6，we entered the gift shop.As I pushed her around，I could see the 7in her face as she looked at everything，happy to be out of her room.She 8some window decorations，and then saw chocolates.

    She asked me to push her in that 9，and then I helped her10all the different chocolate arrangements.11 she decided on three different boxes.

    She told me to write the numbers 1，2，and 3 on the boxes.She 12that the nurses were taking such good care of her，so she13chocolates for each of the three shifts of nurses.As we gave the current shift of nurses their box of chocolate，they14offered some to me before taking some themselves.

    There were15all around.Witnessing the old lady's16and getting the opportunity to spend time with someone who got so much joy from life was a17in itself. I have so many more stories，and each person made an impact on my life. I've 18that health has a way of bringing people together.19is a blessing，and being in a place where health is so 20and appreciated is unlike anything else.