在下列哪一时相中，肺内压等于大气压（ ）。A．吸气和呼气初 B．吸气末和呼气初

判断下列有关化学基本概念的依据正确的是（　　）

A．氧化还原反应：元素的化合价是否变化

B．胶体：物质的微粒直径是否在1 nm～100 nm之间

C．共价化合物：组成物质的元素是否全部是非金属元素

D．化学变化：是否有热效应、颜色变化、气体或沉淀生成等四种实验现象

根据图示分析a、b、c、d四个琼脂块中的生长素含量，正确的结论是

A．a>b>c

B．c>b>d

C．b>a>c

D．a=b=c

Twenty–six years after a terrible bicycle accident which left her in a coma(昏迷) for two months and with permanent brain injuries, Barbara Buchan performs many actions more slowly than others. But on September 10 in Beijing, Buchan, at 52, the oldest member of the United States Paralympic team, broke the record and won the gold medal for her disability class in the individual 3,000–meter cycling pursuit.

“You can be very upset at the world and have everyone take care of you.” Buchan said by telephone from Beijing, “or get back on your feet again.”

Buchan first dreamed of Olympic gold at age 15 while watching the 1972 Munich Games. She became a top American cyclist by July 1982, when a terrible road–race crash injured her brain and left doctors doubtful about whether she would survive. She was wearing only a soft leather helmet at the time; her accident made the rule put into practice that cyclists wear the hard–shell helmets that are now common.

Buchan recovered enough of her athletic ability to run track in the 1988 Paralympics in Seoul, where she won a silver medal in the 800 meters. Women’s cycling was not included in the Paralympics yet, so Buchan trained to the point where she raced against men in the 2000 Paralympics in Sydney, Australia-she finished 9th and 10th in two races-and then successfully fought for a separate women’s cycling program beginning in 2004 in Athens, where she did not get a medal.

Even though she was approaching her 50s, Buchan kept racing and again made the United States Paralympic team for Beijing-where she is twice the age of most of her teammates and competitors.

“Barbara’s almost the leader of our team-she’s been through it all,” said Craig Griffin, the United States cycling coach. “She’s never tired. She’s never let her body go and then come back. I don’t think age is as big of a deal as people make it out to be.”

64. According to the text, after the accident,         .

A．Buchan asked her friends to take care of her

B．cyclists started to wear helmets in competition

C．Buchan could not answer questions correctly

D．doctors doubted whether Buchan could come back to life

65. What’s the right order of the events related to Buchan?

a. She won a gold medal in Beijing.

b. She became a top American cyclist.

c. She won a silver medal in the 800 meters.

d. She suffered a terrible bicycle accident.

e. She took part in a cycling program in Athens.

A．c-d-b-a-e               B．b-c-d-a-e 

C．b-d-e-c-a         D．c-b-d-e-a

66. What does the underlined phrase “get back on your feet” in the second paragraph mean?

A．rise to your feet              B．walk on your way

C．go beyond yourself  D．depend on yourself

67. Which of the following can be the best title for this passage?

A．The Making of a Hero     B．From a Loser to a Winner

C．All Roads Lead to Rome  D．Health is Better than Wealth

凸焊主要用于焊接( )和低合金钢的冲压件。

A．超薄钢

B．低碳钢

C．氧化皮

D．硅钢