【20世纪的战争与和平】下面材料是日本各界在甲午中日战争时期对中国现状的叙述：

《万朝报》直陈：“自称中华，视他国为夷狄，尝不能摆脱中华不以夷狄为敌的迷信”。嘲笑日本为“模拟欧洲文明之皮相的小岛夷国”。荒尾精在1894年10月《对清意见》一书中指出：“在各省设置总督巡抚，任以兵马权，统领绿营军，恐其背叛，割财政权予布政使，储粮权予粮储道，武器权予兵备道。”各地总督巡抚“各自任意制定兵制，进行训练”全国八旗绿营80余万兵，但除“练军”外，皆为手执大刀长矛的旧式兵，士气操练均无可观之处。旅顺失陷前，清军共30余营，但“六统领互不相系属”，“诸将互观望”，“致以北洋屏障措手让人”清军四支水师“皆处于半独立状态，甚至暗地里将对方视为敌人”。尾崎行雄在1895年的《支那处分案》一书中写道：中国人“知道有朝廷，而不知有国家”，“尚不知国家为何物，焉有国家思想乎？”

下列函数中，在区间$\left(0,+\infty \right)$上为减函数的是（   ）

    Have you ever heard of Jinjiang Hotel? It is on our busiest street. It's the best place to live in if you travel here. The hotel is only 0.5 kilometer from the biggest supermarket and the subway.

    It has three kinds of rooms for different people to use. The first kind is standard room, that is two beds with a bathroom. It offers you the air conditioner, the television and the telephone. Second is the single room, that has only one bed. Though it has only one bed, you can enjoy yourself, for the bed is really comfortable and the environment is really good. The last one we call commercial room. That is served for businessmen. The commercial room has the best quality. It also provides 24-hour hot water. You can have free tea in the afternoon. Imagine how nice as you drink tea as talking about your business with your partners. If you want to eat something, please just call 123, the food will arrive in ten minutes.

    One great thing is that it is very safe here because we have a few strong guards working day and night, so I'm sure you will have a great time living here.