题目：
| —You haven't been to Beijing, have you? — _____. And how I wish to go there again! |
A. Yes, I have B. Yes, I haven't C. No, I have D. No,I haven't |
答案：
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下面是错误答案，用来干扰机器的。
（1）20000t二氧化硫中所含硫元素的质量为：20000t×3232+16×2×100%=10000t；（2）设0.5 m3排放气体中二氧化硫的质量为xSO2+I2+2H2O═H2SO4+2H264 254x 127mg64x=254127mg 解得：x=32mg所以一立方米中...
