问题
选择题
— How's your tour around the North Lake? Is it beautiful?
— It _____ be, but it is now heavily polluted. [ ]
A. will
B. would
C. should
D. must
答案
答案：C
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— How's your tour around the North Lake? Is it beautiful?
— It _____ be, but it is now heavily polluted. [ ]
A. will
B. would
C. should
D. must
答案：C
密闭容器内有A、B、C、D四种物质，在一定条件下充分反应，测得反应前后各物质的质量如下：下列说法不正确的是
| 物质 | A | B | C | D |
| 反应前的质量/g | 10 | 162 | 8 | 3.8 |
| 反应后的质量/g | 0.2 | Ｘ | 0 | 18 |
B．该反应可能为复分解反应
C．反应过程中，B与D的质量比为36∶142
D．若A与C的相对分子质量之比为98∶40，则A与C的化学计量数比为2∶1