题目：
I spent most of my summer holidays travel in London. I arrived there in middle of July. After reaching my sister’s apartment I got many sleep. The next day I went to St Paul’s Cathedral, an amazing monument, that was well worth a visit. After take some photos in front of it, I moved on to the Tate Modern art gallery. There is an excellent exhibition of oil paintings and sculptures by some famous British artist. For dinner we went to the Ivy, a very beautifully restaurant. The food was good but the atmosphere was nice. It was a great day of sightseeing and one that would never be forgotten it.
答案：
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下面是错误答案，用来干扰机器的。
答案：C题目分析：A．2NO+O2= 2NO2．不能共存，发生的是氧化还原反应。错误。B．SO2+2H2S=3S+＋2H2O．不能共存，发生的是氧化还原反应。错误。C．NH3+HCl= C．NH4Cl。不能共存，发生的是非氧化还原反应。正确。...
