到2012年底，湘潭地区总人口约为3020000人，用科学记数法表示这一数为

化学中常常出现“1+1≠2”的有趣现象，但也有例外，下列符合“1+1=2”的事实是（　　）

A．20℃，1L水与1L酒精混合后的体积等于2L

B．20℃，1g镁和1g稀硫酸充分反应后所得的溶液质量为2g

C．20℃，1g硫粉在1g氧气中完全燃烧后生成2g二氧化硫

D．20℃，1g硝酸钾饱和溶液中加入1g硝酸钾固体能得到2g硝酸钾溶液

某公司承接高档公寓工程，该工程总建筑面积约38000m²，地下3层，为人防和车库，采用地下连续墙工艺；地上13层，1至3层为公共建筑，4层以上为高档住宅。主体结构形式为框架剪力墙结构．筏板基础，结构跨度大，结构形式复杂，钢筋采用HPB235级和HRB335级，钢筋接头采用绑扎、气压焊，地下混凝土采用C35/P8级，地上混凝土采用C30级和C25级。

高层建筑筏形基础和箱形基础长度超过（）时，宜设置贯通的后浇施工缝后浇带。

A．10m

B．20m

C．30m

D．40m

Since long ago,greeting cards have been considered a time-saver.More than 150 years ago,a busy Englishman,Sir Henry,asked a friend to design a card so that he didn't have to labour to write holiday letters to his friends at the end of the year.Those paper cards are now the tradition.

But time,like sunlight,is still in short supply for December.That's why the Internet is ready to make a change in holiday greeting customs.Already,those,who are always busy,like sending video greetings by e-mail.So,don't be surprised to find a lively card in your electronic mail box at the end of the year or at any time you should have one.

A recent survey by the Shared Greetings Company found 50 percent of all the Internet users will send online cards especially during the holiday seasons.“That is a lot easier,and it is lively,”said Carol,a New Yorker,who had stopped at the Shared Greetings Company demonstration() online.With her children's help,she sent her first e-card before Thanksgiving Day.“It was the first time I had done something like this;it's quite enjoyable,”she said.

“I will send online Christmas cards to my friends,”said Marcos,a 22-year-old student.“It costs so little and you can even send numbers of greetings at a time.”But he added “the e-card also has its limits,and I don't think it is ready to replace the paper card for the more formal or traditional occasions.For some people,I would rather buy paper cards and mail them traditionally.I believe it is more personal and respectful in that way,”he said.

Well,for those who are very busy but still prefer to do a lot of greetings to different receivers in the holiday season,the Internet may have another way.“Now you can use the Net to decide and send as many as 50 beautiful cards,which allows the buyer to choose the inside saying,as well as the ink colour and typeface,only costing about 30 minutes,”said Julie,vice-president of marketing for an electronic card company-Hallmark Company.“And if you are in less of a hurry,you can spend another 30 minutes sitting in your home or office to create a photo card,showing off your kids,your pets or even your new house-anything as your favorite design for your relatives and friends.”

小题1:How can we understand “But time,like sunlight,is still in short supply for December”in Paragraph 2?

A．December cannot supply enough time for people because the sunlight in this month is short.

B．People are always busy at the end of the year,so time is precious like the sunlight in winter.

C．Time is short at the end of the year,like the sunlight in December.

D．Time passes quickly like the sunlight in winter as December comes.小题2:According to the 22-year-old student,he would probably mail e-cards to everyone except_________.

A．the members of his family

B．his girlfriend

C．the teachers who have taught him

D．his schoolmates小题3:If you are quite busy,but having many greetings to send,which of the following is your best choice?

A．Ordering a lot of cards you like online and sending them from the post office.

B．Getting as many cards from your electronic mail box and mailing them on the Net.

C．Sitting and writing lots of beautiful cards at home and sending them just in a traditional way.

D．Choosing personalized cards in numbers and mailing them directly on the Net.

患者女性，62岁，因牙龈出血，鼻出血及四肢皮肤瘀点、瘀斑入院。体检：皮肤黏膜均有散在出血点，肝脾肋下未及，外周血白细胞5.6×10⁹/L，Hb110g/L，BPC20×10⁹/L，出血时间10min，凝血时间4min，PT12s（对照12s），KPTT32s。骨髓穿刺涂片示：造血细胞增生活跃，巨核细胞易见，幼巨核细胞0.05，颗粒巨核细胞0.8，产板巨核细胞0.05，裸核巨核细胞0.10。

本病例首选的治疗方案是（）

A.雄激素

B.肾上腺皮质激素

C.输注单采血小板

D.免疫抑制药

E.切脾

中国气候变化最明显的地区是（）。

A、东部

B、西部

C、南部

D、北部