消化性溃疡最常见的并发症是A．出血B．穿孔C．电解质紊乱D．癌变E．幽门梗阻

某孕妇，末次月经记忆不清，行产前检查，宫底位于脐上3横指，头先露，浮，腹围94cm，宫高26cm，估计孕周为（）

A．28周

B．32周

C．36周

D．38周

E．40周

下列化学实验操作中，先后顺序不正确的是（　　）

A．用托盘天平称量物质的质量时，应先调零，后称量

B．制备气体时应先检查装置的气密性，后向装置中加药品

C．点燃可燃性气体时，应先验纯后点燃

D．测定溶液的pH时，应先将pH试纸湿润，后将待测溶液滴在试纸上

(12分)在右图所示的实验装置中，E为一张用淀粉、碘化钾和酚酞混合溶液润湿的滤纸，C，D为夹在滤纸两端的铂夹，X，Y分别为直流电源的两极。在A，B中充满KOH溶液后倒立于盛有KOH溶液的水槽中，再分别插入铂电极。切断电源开关S₁，闭合开关S₂，通直流电一段时间后

请回答下列问题：

(1)标出电源的正、负极：X为___极，Y为___极。

(2)在滤纸的C端附近，观察到的现象是_        ___，在滤纸的D端附近，观察到的现象是__            __。

(3)写出电极反应式：A中_ ___；B中_ ___；C中__ __；D中_ ___。

(4)若电解一段时间后，A、B中均有气体包围电极。此时切断开关S₂，闭合开关S₁，则电流计的指针是否发生偏转（填“偏转”或“不偏转”）__               __。

(5)若电流计指针偏转，写出有关的电极反应式（若指针“不偏转”，此题不必回答）：

A中_____   ____ __           _；B中__ ________                __。

若电流计指针不偏转，请说明理由（若指针“偏转”，此题不必回答）____     __    ___   _     ____    __   __  _____   _ __     __   _   __         __。

无呼吸系统疾病的择期手术病人的术前呼吸道准备措施主要是

A．应用抗生素

B．进行体位引流

C．应用支气管扩张剂

D．口服地塞米松

E．戒烟

Jeremy Shu-How Lin, who was born in California, 1988, world-famous now，is the first Chinese-American professional basketball player with the New York Knicks of NBA.

It hasn't been an easy road for Lin. After high school, Lin sent his resume(简历) and a DVD of highlights to all the Ivy League schools, and his dream schools Stanford and UCLA. Harvard and Brown were the only schools that guaranteed him a spot on their basketball teams, but Ivy League schools do not offer athletic scholarships.

After graduating from Harvard University, Lin went undrafted in the 2010 NBA Draft . Lin spent his first season with his hometown the Golden State Warriors. He saw limited minutes with the Warriors, but was cheered in arenas(比赛场) around the country, particularly in cities with large Asian communities, as fans came out in crowds to cheer their homegrown star. In late 2011, Lin spent less than two weeks with the Houston Rockets, moving to the New York Knicks at the very end of the year.

He has made several trips to the NBA's Development League, a minor league for players who show promise but need seasoning before they can compete at the highest level. It appears to have paid off. In February 2012, after keying the Knicks victory over New Jersey, Lin was named the starter for the Utah game, a position he appears to have a hold on in the short term, as Baron Davis, who signed in December to play the position, stays on the disabled list. Lin will likely get stronger the more minutes he plays, and even if Davis returns, spelling the older, recovering player could be productive for Lin: a proven good student who can learn a lot from practicing against a veteran.

Without the services of All-Stars Carmelo and Amare, Lin led New York to a 4-0 record last week. He became the first player in NBA history to record at least 20 points and seven assists in each of his first four starts, which generated a global following known as Linsanity. The Associated Press called Lin "the most Surprising story in the NBA".                                                                          

小题1:From the passage we can know that Lin         ．

A．enjoyed himself in the Houston Rockets

B．used to be a leader in the New York Knicks

C．is a proven good student who can learn a lot from other players.

D．led New York to success with the help of some All- Stars.小题2:According to the passage, which statement is true?  

A．Harvard offered Lin an athletic scholarship．

B．Harvard and Brown make sure of Lin's position on their basketball teams．

C．Stanford and Harvard were Lin's dream schools．

D．Lin’s DVD impressed all the Ivy League schools greatly．小题3:Which of the following can be the main idea of this text?

A．How the word Linsanity came into being．

B．Introduction to Jeremy Shu-How Lin．

C．How Lin becomes successful．

D．Lin and New York Knicks