问题
选择题
John felt completely ________ among all these successful people. [ ]
A. against place
B. in place of
C. at place
D. out of place
答案
D
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John felt completely ________ among all these successful people. [ ]
A. against place
B. in place of
C. at place
D. out of place
D
现有一瓶物质，为甲和乙的混合物，已知甲和乙的某些性质如下表，据此，将甲和乙分离的最佳方案是（ ）
| 物质 | 分子式 | 熔点 | 沸点 | 密度 | 可溶性 |
| 甲 | C3H6O2 | -98 ℃ | 57.5 ℃ | 0.93 | 溶于水 |
| 乙 | C4H8O2 | -84 ℃ | 77 ℃ | 0.91 | 溶于水 A．萃取法 B．升华法 C．分馏法 D．分液法 |