问题
选择题
8个色彩不同的球已平均分装在4个箱子中，现从不同的箱子中取出2个彩球，则不同的取法共有种.…( )
A．6
B．12
C．24
D．28
答案
答案：C
从4个箱子中取2个，有
种选法，每个箱子中的球都有
种选法，所以不同的取法有··=24种.
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8个色彩不同的球已平均分装在4个箱子中，现从不同的箱子中取出2个彩球，则不同的取法共有种.…( )
A．6
B．12
C．24
D．28
答案：C
从4个箱子中取2个，有种选法，每个箱子中的球都有种选法，所以不同的取法有··=24种.
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| A long time ago, in Egypt, there lived a famous person named Zun-Nun. A young man came to 1__ him and asked, "I don't 2 why people like you always dress simply." Zun-Nun smiled and 3 his ring from one of his fingers and said, "I'll answer your _4 _, but first take this ring and go to the 5 _ across the street. Can you sell this for one chip of gold?" Looking at the dirty ring, the young man became 6 _, "One chip of gold? I'm not sure if it could be 7 at that price." The young man went to the market quickly. He __8 the ring to the vegetable, meat and fish traders, and the others. But nobody was willing to __9 a chip of gold. He went back and reported. "Nobody was 10 enough to offer more than one chip of silver." With a smile Zun-Nun said, " Now go to the old shop in this street and show this to the 11_ trader. Don't give your 12 ; just see how much he will pay for it." The young man went to the shop __13_ and returned with a(n) 14 expression on his face. He reported, "The trader offered one thousand chips of gold for this ring, and the 15 _ of it was one thousand times higher than what the traders in this market offered." Zun-Nun just smiled and 16 softly, "That was the answer to your question , my friend. A person cannot be valued only by his 17 . The gold and diamond inside someone could 18 be seen and valued if you could look at the _19__ soul. It requires he art to see, and it involves a 20 . We can't see it from the words or attitude. Many a time what we think is brass is gold." | |||
| ( ) 1. A. beg ( ) 2. A. agree ( ) 3. A. held ( ) 4. A. question ( ) 5. A. playground ( ) 6. A. careful ( ) 7. A. sorted ( ) 8. A. offered ( ) 9. A. cost ( )10. A. greedy ( )11. A. coal ( )12. A. price ( )13. A. repaired ( )14. A. angry ( )15. A. color ( )16. A. spoke ( )17. A. language ( )18. A. also ( )19. A. outer ( )20. A. process | B. visit B. suppose B. put B. telephone B. company B. doubtful B. checked B. added B. search B. brave B. steel B. attitude B. mentioned B. pitiful B. weight B. felt B. accent B. only B. extra B. location | C. help C. understand C. took C. alarm C. stage C. hopeful C. imported C. donated C. pay C. just C. cotton C. advice C. damaged C. cold C. value C. touched C. kindness C. still C. inner C. luck | D. question D. think D. tore D. description D. market D. helpful D. sold D. led D. buy D. cruel D. gold D. explanation D. painted D. different D. size D. played D. dress D. always D. lost D. support |