下列药品和装置合理，能完成相应实验的是（ ） A． 喷泉实验 B． 实验室制

国家广电总局发布的消息称：从2013年2月25日至3月17日期间，我国用于广播电视节目传输的同步卫星（位于赤道上空，绕地球的周期与地球的自转周期相同）将进入日凌期，在此期间受影响的波段对应的电视台节目会突然出现图像不清晰和短暂雪花现象。读图完成下列问题。

小题1:日凌现象出现时，通讯卫星与其它天体的位置关系是(　　)

A．通讯卫星位于太阳和月球之间

B．通讯卫星位于地球与月球之间

C．通讯卫星位于地球与太阳之间

D．通讯卫星与地球、月球、太阳共线小题2:地面接收站受日凌干扰使对应波段电视节目图像不清的时间出现在一天中的(　　)

A．日出前后

B．日落前后

C．中午前后

D．午夜前后

下列数据中最接近实际的是（　　）

A．一本九年级物理书的质量约为60g

B．普通铅笔的长度约为40cm

C．教室里每盏日光灯的功率约是40W

D．小明上学时步行的速度大约是10m/s

Microsoft founder Bill Gates has recovered his spot at the top of the US money heap, taking the place of investor Warren Buffett as America's richest person, Forbes magazine's latest list reveals.

With 57 billion dollars net worth Gates again leads the list of 400 richest individuals in the world's wealthiest country. He displaced Buffett who briefly held the position this year but who has seen his Berkshire Hathaway investment group's shares slip 15 percent since February and is now worth 50 billion.

According to Forbes, whose list was published late Wednesday, the golden 400 have 1.3 billion dollars net worth or more. However, their combined net worth rose only 30 billion dollars, or two percent, to 1.57 trillion dollars.

Forbes said that rising oil and dizzy art prices fuelled the entry of 31 new members into the ultra-rich club and the return of eight previous members.

A notable arrival was Mark Zuckerberg, 24, founder of the social networking site Facebook（脸谱网）. Forbes estimates his worth at 1.5 billion dollars.

Meanwhile, turmoil（动荡）on the stock and housing markets saw 33 others drop off the list, including the former head of the troubled insurance giant AIG, Maurice Greenberg, and a former head of the online auction site eBay, Margaret Whitman.

Biggest gainers were led by New York Mayor Michael Bloomberg who took eighth place with 20 billion dollars worth after a transaction（交易）put a new value on his Bloomberg media and financial data network.

The biggest loser was casino（赌场，娱乐场）tycoon Sheldon Adelson, whose fortune fell 13 billion dollars over 12 months -- the equivalent to 1.5 million dollars an hour -- although he still has 15 billion dollars and occupies 15th place.

About two thirds of the list are self-made billionaires and just over 10 percent are women, led by television star Oprah Winfrey whose fortune rose 200 million dollars to 2.7 billion dollars.

小题1: According to Forbes, Warren Buffet is worth _____.

A．57 billion dollars

B．50 billion dollars

C．1.5 billion dollars

D．20 billion dollars小题2:31 new members entered the ultra-rich club as a result of _____.

A．turmoil on the stock and housing market

B．media and financial data network

C．rising oil and dizzy art prices

D．investment小题3:The purpose of the author using the television star Oprah Winfrey as an example is to _____.

A．tell the readers that television stars make money easily

B．prove that a millionaire can become a billionaire

C．women can also be billionaires

D．tell the readers that most of the billionaires are self-made小题4:It can be inferred from the story that _____.

A．one earns much and also loses much

B．stability of markets has much effect upon people’s wealth

C．the computer industry makes more billionaires

D．young people can also be billionaires小题5:What is the best title of the passage?

A．Bill Gates Leading World’s Richest People Again

B．What Made Billionaires

C．Self-Made Billionaires

D．Biggest Gainer and Biggest Loser

缺铜可导致皮下出血，内出血和心血管功能紊乱，这主要是由于（）

A.葡萄糖氧化酶功能不全，内源性维生素C合成过少

B.铁氧化酶功能不全，机体贫血，血管壁营养不良

C.赖氨酰氧化酶功能不全，胶原和弹性蛋白的交联不完全

D.色素氧化酶功能不全，机体缺乏能源

E.超氧化物歧化酶功能不全，过氧及超氧化物损伤血管壁

有关骨显像的适应证，下列情况中不属于这个范围的是

A．不明原因的骨痛

B．前列腺癌，PSA>10ug／L

C．临床可疑骨折，X线阴性

D．类风湿性关节炎非活动期

E．代谢性骨病