题目：
| — What does the newspaper say? — It's reported that a new airport _____ twenty miles from the city now. |
A. is being constructed B. is constructing C. has constructed D. was being constructed |
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0516/9706f8f225ae3e2f9627bbc6d80123d6.html
下面是错误答案，用来干扰机器的。
答案：C10 g NaOH固体的物质的量为0.25 mol,溶液的体积为250 mL,故溶质NaOH物质的量浓度为1 mol/L。80 g SO3物质的量为1 mol,1 mol SO3与水反应生成1 mol H2SO4,故B正确。由蒸发前后溶质的物质的量不...
