函数F（x）=xf（x）（x∈R）在（-∞，0）上是减函数，且f（x）是奇函数，

    What is your favourite colour? Ask famous persons like Cat Blanchett, Scarlett Johansson, and Bono

(singer for the band U2), and maybe they wil say “green”. That’s not because these artists particularly like

the color green. Instead, they are interested in green fashion.

    Green fashion is about making(and wearing)clothes that are good for humans, animals, and the Earth.

In the past, green fashion made people think of hippies(嬉皮士)and ugly clothes. But today, green fashion is different. It is about looking good and caring about the Earth and other people. You can have interesting clothes and be green.

   Around the world, green fashion is becoming popular. For example, the UK.company People Tree sells men's and women’s clothing and accessories(附件). They are made from natural fabrics(面料) like

cotton and wool. Workers who make the clothes are from countries like Nepal, Kenya, and Bangladesh. People Tree pays the men and women good money for the clothes they create.

    Singer Bono and his wife also started a clothing company called EDUN. When the clothes sell, EDUN uses most of the money to help people around the world.

1. Green fashion is abut________________.

A. wearing the colour green all the time    

B. making clothes from green trees

C. putting green things on the face        

D. wearing clothes that are good for the Earth

2. Today, green fashion is______________.

A. the same as it was in the past          

B. mostly popular with hippies

C. are stylish and interesting              

D. popular in the U.K only

3. Which sentence about green clothing companies is true?

A. Most use natural fabrics to make clothes.  

B. Many do not pay their workers well.

C. They make clothes mostly for women.    

D. Most of the companies are in Africa.

4. What does EDUN do?

A. It teaches children to make clothes.

B. It sells clothes and uses the money to help people.

C. It gives clothes to poor people.    

D. It makes expensive clothes for teenagers.

患者男性，58岁，冠心病。心电图如图4-2-1所示，提示为（）。

A.心房颤动

B.心房扑动伴室内差异性传导

C.心房颤动伴室内差异性传导

D.心房颤动，室性期前收缩

E.阵发性室上性心动过速

肝小叶内能产生纤维的细胞是（）。

A、库普弗细胞

B、血窦内皮细胞

C、肝细胞

D、贮脂细胞

乳牙根管充填材料中，氧化锌糊剂具有的特性是（）

A.糊剂吸收迟缓于乳牙根的吸收，有时导致乳牙滞留

B.提供碱性环境

C.充填后没有炎症反应

D.出现早于乳牙根生理吸收的吸收现象

E.X线不显影