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问题 填空题
已知函数f（x）满足：对任意实数x1＜x2，有f（x1）＞f（x2），且f（x1-x2）=
f(x1)
f(x2)
，写出一个满足条件的函数，则这个函数可以写为f（x）=______．（注：只需写出一个满足条件的函数即可）
答案

∵对任意实数x1＜x2，有f（x1）＞f（x2），∴f（x）是R上的减函数．

∵f（x1-x2）=

f(x1)
f(x2)
∴f（x）是指数函数．同时满足以上两个条件的函数比如：f（x）=(
1
2
)x

验证：f（x1-x2）=(

1
2
)x1-x2=
(
1
2
)x1
(
1
2
)x2
=
f(x1)
f(x2)

故答案为：(

1
2
)x（底数为0至1之间的任意一指数函数均可）

填空题


Every Object Tells a Story凡事皆有戏
Everyone has a particular object to which they attach a special meaning or story. Every Object Tells A (1) is a participative website that enables people to explore the stories and meanings behind collections of museum objects. (2) to the site can create their own stories and share their own interpretations and objects online.
The project (3) on the art of storytelling and involves four regional museums, in partnership with Channel 4 and Ultralab, a (4) technology research centre at Anglia Polytechnic University. It will be led by the Victoria and Albert Museum. It (5) the personal meanings and histories behind objects to get people to look at them in new ways. It (6) designed to inspire them to create their own stories and share their interpretations and objects of personal significance (7) a growing online community.
Video, audio, text and pictures combine on the site to offer an enticing, accessible (8) into the content. Users can choose to browse the hundreds of objects featured, or they can search for (9) particular theme or person. They can decide on the level of information they want on an object, from (10) stories conveyed through text and pictures, to the richer experience offered by accompanying video and audio. They will (11) encouraged to add their own interpretation or object to the collection, by uploading text, images, video or audio (12) the site or by sending text and images from a mobile phone. In so doing, they will be (13) to the website’s content and illustrating how a single object can convey different meanings to different people.
The (14) stories and wonderful objects will appeal to a broad audience. The project has specific relevance to all key (15) of the National Curriculum in English and literacy. Outreach sessions in regional partner museums will encourage people to (16) involved in the project locally and a video booth will travel around England, visiting shopping centres, libraries, bus (17) and the like, to enable people to capture their object and story in a short video. This will (18) be uploaded onto the site.
In addition to the national and local publicity given to the project, Channel 4 (19) promote the website from a number of its programmes, ensuring a wide appeal and providing an added (20) for people to contribute their content.

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多项选择题 X型题

下列属于胃功能失调的是（）

A.胃受纳障碍

B.胃腐熟水谷功能失常

C.胃的和降失职

D.胃脘胀满气上逆

E.脘腹胀满，腹泻便溏
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