男性，70岁。持续性上腹部和腰背部疼痛3个月，以夜间为重，前倾坐位时疼痛可以减轻。病

下列良性骨肿瘤呈多发性表现的是()

A．血管瘤

B．骨软骨瘤

C．骨样骨瘤

D．软骨瘤

E．神经末梢瘤

When I spent Christmas away from home in Europe for the first time, I was only 14 and it was absolutely horrific. I am now married and live in the US. So there is little possibility for me to go home for Christmas. Now I am able to get through Christmas with some moments of joy:

First, you are advised to search you area for stores that carry items from your home country or town. Buy food, candles and some other things that mean something to you.

Hold on to the traditions from your home that you think are important even if other people think they are stupid. But keep in mind to be open for new traditions from wherever you might be, because those traditions are as important to those people around you as yours are to you. For me that includes celebrating Christmas on the 24^th.

Call, write Christmas cards, buy gifts and mail them to loved ones, just as if you were there. If you try to pretend as if the holiday doesn’t exist, you are just going to make it worse.

Introduce your traditions to your loved ones, especially your kids. It will only enrich their celebration of the holiday to have some unique traditions in their home. Little by little it will become their tradition and it’s fun for them to try something new.

Find clubs, churches or organizations that are from your home country. Chances are that they will have some celebration with some of your traditions which you can join in.

Food is one of the most important factors in any kind of tradition. Find the recipe of that cake your grandmother used and make it your tradition to bake that particular cake.

Call up your parents and get them to send you some of your favorite childhood ornaments (装饰品) for your tree.

Embrace new traditions, talk to your family about which ones you want to make your own and stick with them.

If you are far away from home, Christmas can never be the same as you experienced it before, but it is important to remember these traditions while appreciating the new ones. Keep an open mind and find a compromise between old and new traditons.

小题1:The author spent his 14^th Christmas ___________.

A．unpleasantly in the US

B．joyfully in the US

C．unpleasantly in Europe

D．joyfully in Europe小题2:Why does the author advise people to hunt in some special stores?

A．Because people can buy some discounted goods there.

B．Because people can feel less homesick there.

C．Because it’s an old Christmas tradition.

D．Because they offer goods from the hometown of the people.小题3:Which of the following statements does the author agree with?

A．It’s great for children to have some unique traditions.

B．People should join in all kinds of clubs to celebrate Christmas.

C．People should give up traditions which are stupid in other people’s eyes.

D．It is popular to celebrate Christmas on the 24^th around the world.小题4:The author suggests giving a call to parents on Christmas mainly to __________.

A．express love to them

B．follow the tradition

C．ask for some ornaments

D．set an example for children

中国移动全网重大通信故障定义中，国际长途话音业务：至所有国际方向IDD、IP电话（17950、17951、12593等）业务质量下降（接通率指标较正常值下降（）以上）超过30分钟；至一个或一个以上国家或地区IDD、IP电话（17950、17951、12593等）业务中断超过（）。

A、40%

B、20%

C、60分钟

D、30分钟

某投资者2007年年初准备投资购买股票，现有甲、乙、丙三家公司可供选择，甲、乙、丙三家公司的有关资料如下： (1)2007年年初甲公司发放的每股股利为4元，股票每股市价为18元；预期甲公司未来 2年内股利固定增长率为15%，在此以后转为零增长； (2)2007年年初乙公司发放的每股股利为1元，股票每股市价为6.8元；预期乙公司股利将持续增长，年固定增长率为6%； (3)2007年年初丙公司发放的每股股利为2元，股票每股市价为8.2元；预期丙公司未来2年内股利固定增长率为18%，在此以后转为固定增长，年固定增长率为45；假定目前无风险收益率为8%，市场上所有股票的平均收益率为16%，甲、乙；丙三家公司股票的β系数分别为2、1.5和2.5。 要求： (1)分别计算甲、乙、丙三家公司股票的必要收益率； (2)分别计算甲、乙、丙三家公司股票的市场价值； (3)通过计算股票价值并与股票市价相比较，判断甲、乙、丙三家公司股票是否应当购买； (4)假设按照40%、30%和30%的比例投资购买甲、乙、丙三家公司股票构成投资组合，计算该投资组合的综合β系数和组合的必要收益率。

脱碳系统的作用是什么？