近年来我国粮价的上涨并没有引起居民的恐慌，这是因为 A．生活必需品价格的变动对人

Laura lived in a small village near the sea. One day she decided to go for a swim in the sea. She knew that the sea near the ____1____ has a strong tide (浪) , but she was a good swimmer, so she wasn’t __2______. Laura left her friends lying on the sands and ran into the sea. She swam quite far from the beach and waved（挥舞） to her friends in the distance. After a short while she decided to swim ____3___. She tried her best, but she couldn’t get any closer to the beach . The tide kept___4___her back. She waved her arms in the air to let her friends know that she was____5____, but they just waved back, for they didn’t know what she___6_____. After a long time, Laura became very ______7___ and she couldn’t swim any more. Her legs ____8____and she lost hope. Suddenly, her foot touched ____9____! All the time she had been swimming in a place where the water wasn’t deep! When at last she went back to the beach, one of her friends asked, “ Did you ___10____your swim?”“Yes, it was lovely.” She answered. She never told them what really happened.

小题1: A town        B city         C village          D country

小题2:A lonely       B surprised     C interested        D afraid

小题3: A up          B back        C down           D on

小题4:A pulling      B pushing      C throwing        D putting

小题5:A in trouble     B happy       C out of trouble     D in the water

小题6:A found       B meant        C said             D saw

小题7:A hungry      B sleepy       C thirsty           D tired

小题8:A came up     B were broken  C went down       D moved on

小题9:A a tide       B the sand      C a fish           D one of her friends

小题10:A enjoy       B remember    C drop            D forget

Watching online open classes of US top universities has become necessary for many young Chinese who find it a shortcut to make their life more meaningful, in addition to learning knowledge and language.

Guo Lei, a native of Guangzhou, has become addicted to various open courses after she watched the online video of "Justice: What's the right thing to do."The video clip was taken during an open class taught by Michael Sandel, professor of philosophy at Harvard University.

Sandel set up a situation in which a high-speed train with a technical problem is running towards five people who are working on the current track, while there is only one worker on the adjacent (相邻的) track.He inspired students to discuss what the driver should do -- to change the direction for five lives -- which apparently will kill the other -- or to do nothing and allow five people to die.

Guo said she was immediately attracted by the topic and the discussion of the Harvard students about morality and justice.She even introduced the case to her colleagues for discussion, since Sandel did not give an answer, unlike most Chinese teachers she knew before.

The inspiring and lively teaching style of American professors refreshed Guo's impression about the traditional score-oriented Chinese educational system and prompted more Chinese to frequently search and watch open class resources of American top colleges, including Massachusetts Institute of Technology (MIT) and University of California Berkeley.

On China's social networking websites, such as renren.com, kaixin001.com and sina.com, netizens have spontaneously formed many study groups to share video resources and exchange opinions.Volunteers have added English or Chinese subtitles onto the videos to help more Chinese enjoy the videos without language difficulties.

"The popularity of American open classes reflects the spirit of sharing," said Yu Xinke, Vice chancellor with the Continuous Education School of South China University of Technology.

小题1: If the train driver changes the current track , how many people will be killed?(No more than one word)

小题2:Why can Chinese have no difficulty enjoying the foreign class videos?（No more than 10 words）

小题3: Besides knowledge and language, list three other things Chinese can learn from watching such foreign online class? (No more than 15 words in total)

①                                                    

②                                                         

③                                                       

小题4:What is the main idea of this passage?  (No more than 10 words)

关于尖锐湿疣，下列哪项是错误的（）

A.尖锐湿疣的病原体是HPV

B.尖锐湿疣在性传播疾病中仅次于淋病

C.HPV主要感染上皮细胞，与宫颈癌发病有关

D.雌激素浓度上升及免疫功能低可使病灶迅速发展

E.潜伏期为1～3周，无明显症状，可伴瘙痒、烧灼感

下列指标中用于鉴别原发性与继发性甲状腺功能减退症的是

A．FT₄

B．FT₃

C．TT₄

D．TT₃

E．TSH

试述阵发性室上性心动过速的心电图特征。