问题
选择题
Born into a family with three brothers, David was _____ to value the sense of sharing.[ ]
A. brought up
B. turned down
C. looked after
D. held back
答案
答案：A
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Born into a family with three brothers, David was _____ to value the sense of sharing.[ ]
A. brought up
B. turned down
C. looked after
D. held back
答案：A
用下图所示装置进行实验中，将甲中的液体滴加到乙中，均有气泡出现，根据乙、丙装置中出现的现象得出的结论且正确的是
| 甲 | 乙 | 丙 | 丙中现象 | 结论 | |
| A | 盐酸 | 石灰石 | 硅酸钠溶液 | 溶液中出现浑浊 | 非金属性： Cl>C>Si |
| B | 盐酸 | FeS | 溴水 | 溶液褪色 | 还原性： Cl->S2- >Br- |
| C | 浓盐酸 | KMnO4 | KBr溶液 | 无色溶液变为橙色 | 氧化性：KMnO4>Cl2>Br2 |
| D | 浓氨水 | 烧碱 | 酚酞溶液 | 溶液变红 | 氨气是一种弱碱 |