请写出相应的化学符号或化学式。 (1)2个硫原子;(2)3个硝酸根离子; (3)

题型:填空题

问题:

请写出相应的化学符号或化学式。

(1)2个硫原子          ;       (2)3个硝酸根离子          

(3)铝表面易形成一层致密的保护膜,其成分是         

(4)医疗上常用它来配制生理盐水,日常生活中又可用来调味,它是        

考点:化学反应方程式的书写化学图标化学反应方程式的配平化学反应方程式的意义
题型:填空题

某种商品的进价为每件50元,售价为每件60元.为了促销,决定凡是购买10件以上的,每多买一件,售价就降低0.10元(例如,某人买20件,于是每件降价0.10×(20-10)=1元,就可以按59元/件的价格购买),但是最低价为55元/件.同时,商店在出售中,还需支出税收等其他杂费1.6元/件.

(1)求顾客一次至少买多少件,才能以最低价购买?

(2)写出当出售x件时(x>10),利润y(元)与出售量x(件)之间的函数关系式;

(3)有一天,一位顾客买了47件,另一位顾客买了60件,结果发现卖了60件反而比卖了47件赚的钱少.为了使每次卖的越多赚的钱也越多,在其他促销条件不变的情况下,最低价55元/件至少要提高到多少?为什么?

题型:填空题

下列不属于泄泻湿热泻证候的是()

A.泻下急迫

B.气味秽臭

C.夹有泡沫

D.发热口渴

E.小便短黄

题型:填空题

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

题型:填空题
完形填空。
     When I was in middle school, I was one of the smaller players on the basketball team. In our first game
of the season, we were   1   to face a good team, all of whom were tall guys. Naturally, at my   2  , it would
have been easy to be   3   by our competitors.
     On game day, my basketball coach called me over to him. He was a strong and tough coach, and in his
   4   rough manner said, "Joel, you're not that   5  , but let me tell you that size doesn't matter. Don't be afraid.
What   6   is right down in here." He pointed his finger at his   7   as he continued, "Joel, you've got a big heart,
and you're to   8   it this year."
     When I heard the coach's   9  , I stood taller than usual! I thought to myself: The coach believes in me! My
confidence  10  and I played better that year than I'd ever done before.
     It's  11  what we can achieve when we know somebody really believes in us. That coach took a little time
to make a big  12 . He took time to make me confident in myself. If we're going to  13  the best in people, we
need to sow seeds of  14 .
     As the saying goes, "Love looks for a way of being constructive."  15 , love looks for ways to help improve
somebody else's life.
     When people are  16  us, they should leave better off than they were before. People should feel  17  and
inspired after spending any time with you and me  18  feeling discouraged or defeated.
     Remember, there's  19  greater investment (投资) in life than in being a people builder. Relationships  20  
much more to us than our achievements.
( )1. A. requested
( )2. A. age
( )3. A. injured
( )4. A. common
( )5. A. big
( )6. A. matters
( )7. A. back
( )8. A. pass
( )9. A. stories
( )10. A. built up
( )11. A. interesting
( )12. A. sense
( )13. A. speak of
( )14. A. hope
( )15. A. Above all
( )16. A. around
( )17. A. delighted
( )18. A. as well as
( )19. A. some
( )20. A. influence
B. arranged
B. size
B. destroyed
B. normal
B. young
B. promises
B. shoulder
B. get
B. words
B. made up
B. amazing
B. result
B. bring out
B. success
B. On the contrary
B. against
B. challenged
B. rather than
B. still
B. leave
C. determined
C. weight
C. frightened
C. formal
C. tall
C. attracts
C. head
C. make
C. advice
C. took up
C. confusing
C. difference
C. put up
C. fortune
C. In other words
C. above
C. moved
C. in addition to
C. no
C. produce
D. accepted
D. experience
D. cheated
D. usual
D. strong
D. matches
D. chest
D. help
D. praise
D. turned up
D. convincing             
D. surprise
D. stand out
D. excitement
D. In this case
D. below
D. respected
D. except for
D. none
D. mean
题型:填空题

给活塞发动机的飞机加油时,所加燃油的牌号最好应().

A.等于规定的燃油牌号;

B.高于规定的燃油牌号;

C.低于规定的燃油牌号.

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