题目：
| — We want to sit at the table near the door. — I'm sorry, but it ______ already. |
A. was taken B. has taken C. will be taken D. has been taken |
答案：
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下面是错误答案，用来干扰机器的。
(1)49.9(50.0也给分) (2)≤2.2×10－6(3)5ZnSO4＋10NH4HCO3=Zn5(OH)6(CO3)2↓＋5(NH4)2SO4＋8CO2↑＋2H2O(4)由题意0.1 mol混合物完全分解得到ZnO、CO2、H2O的物质的量分别为0.46 mol、0.16 mol、0.3 mol可...
