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【简答题】
完形填空。 Denny Crook was a famous photographer. He traveled all over the world, taking pictures for magazines and newspapers, and won many prizes. 'I'll do anything to get a good photo,' he often said. 'I'll go anywhere at any time, even if it is 1 .' And he told the 2 . He had photos of earthquakes, forest fires, floods and even wars. If something interesting happened, Denny went to photo it. He was a married man and his wife often asked him to take her with him, but he always 3 . 'I'll travel for my work, not for 4 ,' he told her. 'You won't enjoy yourself, and I won't have 5 to look after you. Sometimes there's not even anywhere to 6 , and I have to sleep outside. I often don't have a good 7 or a bath for days. You won't like it.' 'Denny, I'm not a child,' his wife didn't 8 . 'I can look after myself. Please take me with you the next time you go overseas.' Denny did not say anything, but he 9 about it, and when he was asked to go to Africa he said to his wife,'You can come to Africa with me if you want to. I've got to take photos of wild 10 there. It should be interesting and not too uncomfortable.' His wife was very 11 , and at first she had a very enjoyable time. Then Denny went off to 12 some lions to photo. His wife went with him, but before long they became separated. She walked down one path while he walked down the other. Suddenly, Denny heard her 13 . He ran back and saw her running toward him. A huge lion was chasing her. Quickly Denny took his camera out of its case and 14 it at his wife and the lion. Then he shouted, ' 15 , woman! I can't get you both in the picture!' (     )1. A. dangerous (     )2. A. lie (     )3. A. allowed (     )4. A. wealth (     )5. A. money (     )6. A. meet (     )7. A. meal (     )8. A. agree (     )9. A. worried (     )10. A. land (     )11. A. confused (     )12. A. find (     )13. A. singing (     )14. A. threw (     )15. A. Hurry up B. natural B. reason B. refused B. prize B. time B. work B. picnic B. understand B. forgot B. flowers B. excited B. feed B. crying B. fired B. Look out C. convenient C. news C. failed C. pleasure C. interest C. shop C. room C. reply C. asked C. animals C. surprised C. drive C. laughing C. showed C. Slow down D. impossible D. truth D. joked D. luck D. ability D. stay D. party D. complain D. thought D. people D. disappointed D. shoot D. cheering D. pointed D. Go ahead
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举一反三
【单选题】设A,B均为n阶矩阵,则下列命题正确的是(    )
A.
|kA|=k|A|    
B.
(A-B) 2 =A 2 -2AB+B 2
C.
|-kA|-(-k) n |A|    
D.
若AB=0,则A=0或B=0
【判断题】若矩阵A,B满足AB=0,则A=0或B=0.
A.
正确
B.
错误
【判断题】若矩阵AB=0,则A=0或B=0.( )
A.
正确
B.
错误
【单选题】设A,B皆为n阶矩阵,则下列结论正确的是( ).
A.
AB=O的充分必要条件是A=O或B=O
B.
AB≠0的充分必要条件是A≠O或B≠O
C.
AB=O且r(A)=n,则B=0
D.
若AB≠0,则|A|≠O或|B|≠O
【判断题】第五套人民币2005年版100元、50元纸币与1999年版100元与50元纸币比较隐形面额数字的调整是指对观察角度的调整。
A.
正确
B.
错误
【简答题】从下列选项中选择适当的字母填空。 A.渗析 B.凝聚 C.盐析 D.布郎运动 E.电泳 F.丁达尔现象 (1)Fe(OH) 3 胶体呈红褐色,插入两个惰性电极,通直流电一段时间,阴极附近的颜色逐渐变深,这种现象叫____________。 (2)一束光线通过Fe(OH) 3 胶体,可看到光亮的通道,这种现象叫_______________。 (3)将淀粉和食盐的混合溶液放在半透膜制成的口袋中,并把...
【判断题】第五套人民币2005年版100元、50元纸币与1999年版100元、50元纸币比较隐形面额数字的调整是指对观察角度的调整。
A.
正确
B.
错误
【判断题】50元纸币与1999年版100元、50元纸币比较隐形面额数字的调整是指对观察角度的调整。
A.
正确
B.
错误
【判断题】第五套人民币2005年100元、50元纸币与1999年版100元、50元纸币比较,隐形面额数字的调整是指对观察角度的调整。A. 对 B. 错
A.
正确
B.
错误
【简答题】(5分) 从下列选项中选择适当的字母填空。 A.渗析 B.凝聚 C.盐析 D.布郎运动 E.电泳 F.丁达尔现象 (1)Fe(OH) 3 胶体呈红褐色,插入两个惰性电极,通直流电一段时间,阴极附近的颜色逐渐变深,这种现象叫 。 (2)一束光线通过Fe(OH) 3 胶体,可看到光亮的通道,这种现象叫 。 (3)将淀粉和食盐的混合溶液放在半透膜制成的口袋中,并把它悬挂在盛有蒸馏水的烧杯里,从而使淀粉与...
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