问题
选择题
Would you consider ________ your homework first before you go to the cinema?[ ]
A. finishing
B. to finish
C. being finished
D. finish
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Would you consider ________ your homework first before you go to the cinema?[ ]
A. finishing
B. to finish
C. being finished
D. finish
答案：A
某校兴趣小组在实验室中完成制取氧气的实验。他们取氯酸钾和二氧化锰的混合物共3g放入大试管中加热，并在同时测定试管中剩余固体物质的质量（如下表），请分析表中数据，完成下列问题：
| 反应时间/min | 1 | 1.5 | 2 | 2.5 | 3 |
| 剩余固体质量/g | 2.55 | 2.25 | 2.10 | 2.04 | 2.04 |
（2）原混合物中氯酸钾的质量分数是多少？（计算结果精确到0.1%）