问题
选择题
_____ weather it is! Would you like to go out for a picnic with me?[ ]
A. How fine
B. What fine
C. What a fine
D. How a fine
答案
答案：B
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_____ weather it is! Would you like to go out for a picnic with me?[ ]
A. How fine
B. What fine
C. What a fine
D. How a fine
答案：B
将一定量的乙醇（C2H6O）和氧气置于一个封闭的容器中引燃，测得反应前后各物质的质量如下表。则下列说法正确的是（ ）
| 物质 | 乙醇 | 氧气 | 水 | 二氧化碳 | X |
| 反应前质量/g | 4.6 | 8.0 | 0 | 0 | 0 |
| 反应后质量/g | 0 | 0 | 5.4 | 4.4 | a |
C．X可能含有氢元素 D．若起始时氧气的质量是10g，则无X生成