问题
选择题
氧化物组成元素为m种，含氧化合物（不含氧化物）的组成元素为n种，则m与n的关系为[ ]
A. m等于n
B. m小于n
C. m不小于n
D. 无法确定
答案
答案：B
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氧化物组成元素为m种，含氧化合物（不含氧化物）的组成元素为n种，则m与n的关系为[ ]
A. m等于n
B. m小于n
C. m不小于n
D. 无法确定
答案：B
| 完形填空。 |
| Newton (牛顿) was a great English scientist. He was one of the greatest 1 in history. One morning he got up early and began 2 on a difficult problem. It was time to have breakfast, but he was thinking 3 the problem. Her servant, Mary brought a pan of water and egg to his room. She was going to boil (煮) the egg for him. But Newton wanted to do by 4 . He said to Mary, "Please put the egg on the table. I'll boil 5 ." Mary put the egg beside Newton's watch on the table and 6 , "Boil the egg for only four minutes and it'll be 7 . "Then quickly she walked out of the room. Mary was afraid Newton would 8 to boil the egg. She went to his room again half an hour later. What did she 9 ? Newton was standing by the pan, having the 10 in his hand. He had put the watch in the pan and was boiling it . |
| ( )1. A. woman ( )2. A. work ( )3. A. ∕ ( )4. A. itself ( )5. A. one ( )6. A. said ( )7. A. free ( )8. A. forget ( )9. A. look ( )10. A. pen | B. women B. to work B. about B. herself B. ones B. told B. ready B. want B. looked B. egg | C. man C. try C. for C. himself C. it C. spoke C. bad C. decide C. see C. book | D. men D. to try D. over D. themselives D. them D. talked D. well D. need D. san D. watch |