问题
选择题
| —Where is Miss Zhao? —Look, _____. |
A. there is she B. there does she C. there she is D. there she does |
答案
答案：C
搜题请搜索小程序“爱下问搜题”
| —Where is Miss Zhao? —Look, _____. |
A. there is she B. there does she C. there she is D. there she does |
答案：C
（3分）某小组利用实验数据，求算金属M的相对原子质量。已知金属M和硫酸反应的化学方程式为： M + H2SO4 ="=" MSO4 + H2↑。
现取20 g该金属样品于烧杯中，然后向其中加入稀硫酸，实验数据记录如下：
| 实验编号 | 1 | 2 | 3 | 4 | 5 |
| 加入硫酸的质量/g | 100 | 200 | 300 | 400 | 500 |
| 烧杯中剩余物质量/g | 119.8 | 219.6 | 319.4 | 419.4 | 519.4 |